Battery assembly and electric equipment

Abstract

The embodiment of the utility model provides a battery assembly and electric equipment, the battery assembly comprises a battery and a circuit board assembly, the battery comprises a pole core, a shell and a pole column, the shell comprises a plurality of side walls, at least one side wall comprises a first sub-side wall and a second sub-side wall which are connected with each other, and the first sub-side wall and the second sub-side wall are arranged in a second direction. The first sub-side wall protrudes towards the outer side of the shell relative to the second sub-side wall, so that a height difference h is formed between the first sub-side wall and the second sub-side wall, a liquid injection hole is formed in the first sub-side wall, and the pole is arranged on the first sub-side wall; at least part of the circuit board assembly is arranged on the side, away from the pole core, of the second sub-side wall, and the circuit board assembly is electrically connected with the pole core. The battery assembly provided by the utility model is relatively high in volume energy density.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery assembly and an electrical device. Background Technology

[0002] Currently, most battery models consist of a core and a casing. The casing has a cavity to house the core and electrolyte. The core has positive and negative tabs. The battery typically includes a PCM (Protection Circuit Module) assembly, whose two terminals need to be electrically connected to the positive and negative tabs, respectively. In related technologies, a recess is formed on the outer side of the casing, and the PCM assembly is placed within this recess. Simultaneously, an injection hole is located on the bottom wall of this recess, with a certain distance between the injection hole and the core to allow space for electrolyte injection.

[0003] However, the reserved liquid filling space will occupy part of the battery volume, thereby reducing the battery's volumetric energy density. Utility Model Content

[0004] Based on this, embodiments of this application provide a battery assembly and an electrical device. By forming an outwardly protruding first sub-sidewall on the first sidewall of the battery, a height difference h is formed between the first sub-sidewall and the second sub-sidewall. The liquid injection hole is disposed on the first sub-sidewall, so that the height difference h is used to avoid the liquid injection needle, so as to facilitate liquid injection and increase the volume of the electrode core, thereby improving the volumetric energy density of the battery. At the same time, the circuit board assembly is disposed by utilizing the height difference h between the second sub-sidewall and the first sub-sidewall, so as to improve the volumetric energy density of the battery assembly through reasonable layout and provide better protection for the circuit board assembly.

[0005] In a first aspect, this application provides a battery assembly, comprising:

[0006] A battery consists of a core and a casing, with the core housed within the casing.

[0007] The housing includes multiple sidewalls, at least one sidewall includes a first sub-sidewall and a second sub-sidewall, the first sub-sidewall and the second sub-sidewall have a height difference h in a second direction, and in the second direction, the first sub-sidewall is farther away from the electrode core relative to the second sub-sidewall, and the first sub-sidewall is provided with a liquid injection hole.

[0008] At least one pole post is disposed on the first sub-sidewall;

[0009] The circuit board assembly, at least a portion of which is located on the side of the second sub-sidewall away from the pole core, is electrically connected to the pole core.

[0010] In one possible implementation, the outer side of the housing has a recess, a second sub-sidewall forms at least a portion of the side surface of the recess, and at least a portion of the circuit board assembly is housed in the recess.

[0011] In one possible implementation, the first sub-sidewall is further provided with at least one pole post hole, with the pole post located in the pole post hole.

[0012] In one possible implementation, the electrode core includes an electrode core body, and in a second direction, there is a gap between the side of the electrode post near the electrode core body and the side of the electrode core body near the electrode post; and the electrode post is electrically connected to the electrode core body, and the end of the electrode post away from the electrode core is electrically connected to the circuit board assembly.

[0013] In one possible implementation, the battery further includes a sealing assembly disposed at the injection port and sealing the injection port.

[0014] In one possible implementation, the housing has a receiving cavity, which includes a first chamber and a second chamber that are in communication with each other, a first sub-sidewall forming at least a portion of the side surface of the first chamber, and a second sub-sidewall forming at least a portion of the side surface of the second chamber.

[0015] The core is housed in the second chamber.

[0016] In one possible implementation, the first sub-sidewall and the second sub-sidewall are arranged along a first direction.

[0017] In one possible implementation, the length L of the first sub-sidewall in the first direction satisfies: L≥5mm.

[0018] In one possible implementation, the second sub-sidewall, the pole, and the injection hole are arranged sequentially along the first direction.

[0019] In one possible implementation, the core includes a core body, and in a second direction, an injection hole penetrates a first sub-sidewall, with a distance T between the side of the injection hole facing the core body and the side of the core body facing the injection hole.

[0020] The distance T satisfies: 2 mm ≤ T ≤ 10 mm.

[0021] In one possible implementation, the height difference h in the second direction satisfies: 0.1 mm ≤ h ≤ 3 mm.

[0022] In one possible implementation, the pole and the housing are insulated from each other.

[0023] In one possible implementation, a first insulating element is also included, which has a through hole;

[0024] The first sub-side wall is provided with a pole post hole, and the first insulating member is inserted into the pole post hole and abuts between the pole post and the pole post hole, so as to insulate the pole post and the first sub-side wall.

[0025] In one possible implementation, the battery further includes a conductive connector disposed between the electrode core and the electrode post, and electrically connected to both the electrode core and the electrode post respectively.

[0026] In one possible implementation, the battery further includes a second insulating member, at least a portion of which is disposed between the conductive connector and the first sub-sidewall to insulate the conductive connector from the first sub-sidewall.

[0027] In one possible implementation, the second insulating member is further provided with a first clearance hole, which is provided in correspondence with the liquid injection hole, so that the first clearance hole is suitable for connecting the liquid injection hole and the electrode core.

[0028] In one possible implementation, the battery also includes a third insulating element, and the electrode core includes an electrode core body and a first electrode tab, the first electrode tab being connected to the side of the electrode core body near the terminal post.

[0029] The third insulating element is located on the side of the second insulating element near the pole core. At least part of the third insulating element abuts against the side of the second insulating element near the pole core, and the third insulating element surrounds the outside of the first pole tab to insulate and isolate the first pole tab from the housing.

[0030] In one possible implementation, the shell material includes at least one of titanium alloy, stainless steel, nickel alloy, chromium alloy, and aluminum alloy.

[0031] In one possible implementation, the first sub-sidewall is provided with two pole posts, both of which are electrically connected to the pole core, and the polarities of the two pole posts are opposite.

[0032] Alternatively, there may be a single pole, with both the pole and the housing electrically connected to the core, and the poles of the pole and the housing having opposite polarities.

[0033] In one possible implementation, the circuit board assembly includes a substrate, a first connection terminal, and a second connection terminal. One end of the first connection terminal and one end of the second connection terminal are both electrically connected to the substrate. The other end of the first connection terminal is electrically connected to a pole, and the other end of the second connection terminal is electrically connected to a housing or to another pole.

[0034] In one possible implementation, the electrode core includes an electrode core body, a first electrode tab, and a second electrode tab, one of which is a positive electrode and the other is a negative electrode, and both the first electrode tab and the second electrode tab are electrically connected to the electrode core body.

[0035] The first tab is electrically connected to the pole post, the second tab is electrically connected to the housing, and the second connection terminal is electrically connected to the housing.

[0036] In one possible implementation, the second electrode and the second sub-sidewall are electrically connected.

[0037] In one possible implementation, the first connection terminal and the second connection terminal are located on opposite sides of the substrate along a first direction;

[0038] The pole is located on the side of the first sub-sidewall near the first connection terminal.

[0039] Secondly, this application provides an electrical device, including an electrical appliance and a battery assembly provided in the first aspect, wherein the battery assembly is used to supply power to the electrical appliance.

[0040] This application provides a battery assembly and an electrical device. The battery assembly includes a battery and a circuit board assembly. The battery includes a core, a casing, and terminals. The casing includes sidewalls, including a first sub-sidewall and a second sub-sidewall. The first sub-sidewall includes an injection hole and a terminal hole. By making the first sub-sidewall protrude outward relative to the second sub-sidewall towards the outside of the casing, a height difference h is formed between the first and second sub-sidewalls in a second direction. Both the injection hole and the terminal hole are located on the first sub-sidewall. Thus, when setting the terminals, since the terminals need to occupy part of the space within the receiving cavity, the space where the height difference h is located can be used to accommodate the terminals. Furthermore, the space where the height difference h is located can also be used to provide injection space for the injection needle, allowing the injection needle to fully extend into the receiving cavity to improve the injection effect. The height difference h can also accommodate the terminals and other structural components, thereby making full use of the battery space. Since the injection hole is located on the first sub-sidewall, there is already sufficient space between the first sub-sidewall and the core for injection, which can reduce the distance between the core and the second sub-sidewall, thereby increasing the volume of the core and improving the volumetric energy density of the battery.

[0041] Furthermore, since the first sub-sidewall protrudes outward relative to the second sub-sidewall toward the outer side of the housing, the second sub-sidewall can be recessed inward relative to the first sub-sidewall toward the inner side of the housing, and some or all of the circuit board assembly can be placed on the outer side of the second sub-sidewall away from the electrode core, so as to make reasonable use of the space of the housing to arrange the circuit board assembly, thereby improving the volumetric energy density of the battery assembly.

[0042] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the batteries, battery packs, and electrical devices provided by this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0043] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0044] Figure 1 This is a schematic diagram of the structure of the battery assembly provided in an embodiment of this application;

[0045] Figure 2 This is yet another structural schematic diagram of the battery assembly provided in an embodiment of this application;

[0046] Figure 3 for Figure 1 The main view;

[0047] Figure 4 for Figure 1 Exploded view;

[0048] Figure 5 This is a schematic diagram of the structure of the frame and terminals in the battery assembly provided in the embodiments of this application;

[0049] Figure 6 Schematic diagram of the battery assembly provided in the embodiments of this application Figure 1 ;

[0050] Figure 7 Schematic diagram of the battery assembly provided in the embodiments of this application Figure 2 ;

[0051] Figure 8 for Figure 7 A magnified view of the area within the dashed box;

[0052] Figure 9 Schematic diagram of the battery assembly provided in the embodiments of this application Figure 3 ;

[0053] Figure 10 for Figure 9 A magnified view of the area within the dashed circle;

[0054] Figure 11 Schematic diagram of the battery assembly provided in this application Figure 4 .

[0055] Figure label:

[0056] 100 - Electrode core; 110 - Electrode core body; 120 - First electrode tab; 130 - Second electrode tab; 200 - Housing; 210 - Frame; 211 - Side wall; 211a - First side wall; 2111 - First sub-side wall; 2111a - Liquid injection hole; 2112 - Second sub-side wall; 220 - Cover plate; 221 - First region; 222 - Second region; 230 - Receiving cavity; 231 - First chamber; 232 - Second chamber; 240 - Recess; 300 - Electrode post; 400 - Sealing assembly; 410 - Sealing plug; 420 - Sealing cap; 500 - Circuit board assembly; 510 - Substrate; 520 - First connecting terminal; 530 - Second connecting terminal; 600 - First insulating element; 700 - Second insulating element; 710 - First clearance hole; 800 - Conductive connector; 900 - Third insulating element.

[0057] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0059] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0060] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0061] The terms "first," "second," and "third" (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0062] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or display that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or display.

[0063] A battery may include an electrode core and a casing. The casing has a cavity to house the electrode core and electrolyte. The electrode core has positive and negative tabs. The battery typically has a PCM (Polymer Capacitor) plate assembly, whose two terminals need to be electrically connected to the positive and negative tabs, respectively. In related technologies, a recess is formed on the outer side of the casing, and the PCM plate assembly is placed within this recess. Simultaneously, an injection hole is located on the bottom wall of this recess, and the injection hole is a certain distance from the electrode core to allow space for electrolyte injection.

[0064] However, the reserved liquid filling space will occupy part of the battery volume, thereby reducing the battery's volumetric energy density.

[0065] In view of this, embodiments of this application provide a battery, a battery pack, and an electrical device. By forming an outwardly protruding first sub-sidewall on the sidewall of the battery and setting an injection hole on the first sub-sidewall, a space is reserved between the first sub-sidewall and the electrode core for the injection needle to extend into the housing, thereby facilitating injection. Furthermore, the distance from the electrode core to the second sub-sidewall is small, thereby increasing the volume of the electrode core and improving the volumetric energy density of the battery.

[0066] The specific implementation methods of the battery components and electrical devices provided in this application will be described in detail below with reference to the accompanying drawings.

[0067] Reference Figure 1As shown in the embodiments of this application, the electrical equipment provided may include an electrical device and a battery, with the battery used to power the electrical device.

[0068] For example, the power-consuming device can be an electronic device such as a mobile phone or a tablet computer. The electronic device such as a mobile phone or a tablet computer can include a central processing unit and a display screen. The power-consuming device has a battery compartment, in which a battery can be installed and electrically connected to the power-consuming device, thereby enabling the battery current to be transmitted to the power-consuming device.

[0069] Alternatively, the electrical device provided in this application embodiment may include an electrical device and a battery assembly. The battery assembly is used to power the electrical device. The battery assembly may include at least two batteries. Relatively speaking, a single battery can only provide a smaller voltage and a shorter battery life. For electrical devices that require a larger voltage, multiple batteries need to be integrated into a battery assembly with a larger voltage and a longer battery life, so as to power the electrical device through the battery assembly.

[0070] For example, the electrical equipment can be a vehicle, the electrical device can be an electric motor, and the battery pack can provide electrical energy to the electric motor, thereby driving the vehicle. The vehicle can be a pure electric vehicle, a range-extended electric vehicle, a hybrid electric vehicle, etc., and can also be any vehicle with a battery pack.

[0071] Reference Figures 1 to 6 As shown, based on the above embodiments, this application also provides a battery, including an electrode core 100, a housing 200, at least one terminal post 300, and a sealing assembly 400. The electrode core 100 includes an electrode core body 110 and a first electrode tab 120 connected to each other. The housing 200 includes a frame 210, which includes a plurality of sidewalls 211, and at least one sidewall 211 includes a first sub-sidewall 2111 and a second sub-sidewall 2112.

[0072] For example, sidewall 211 may include a first sidewall 211a, and the first sidewall 211a may include a first sub-sidewall 2111 and a second sub-sidewall 2112 connected to each other, the first sub-sidewall 2111 and the second sub-sidewall 2112 being disposed along a first direction. As another example, the second sub-sidewall 2112 may surround the outer periphery of the first sub-sidewall 2111.

[0073] When the housing 200 is not energized, the battery can be equipped with two terminals 300, one positive and one negative. When the housing 200 is energized, the battery can be equipped with one terminal 300, and the second sub-side wall 2112 can be used for electrical connection with external circuits such as the circuit board assembly 500.

[0074] In the second direction, the first sub-sidewall 2111 protrudes outward toward the outer side of the housing 200 relative to the second sub-sidewall 2112, forming a height difference h between the first sub-sidewall 2111 and the second sub-sidewall 2112. The first sub-sidewall 2111 is provided with an injection hole 2111a and an electrode post hole. The electrode post 300 passes through the electrode post hole to be electrically connected to the first electrode tab 120 and the external circuit, respectively. The sealing assembly 400 is provided in the injection hole 2111a and is used to seal the injection hole 2111a.

[0075] The first direction can be referred to as the X direction in the attached figure, and the second direction can be referred to as the Y direction in the attached figure.

[0076] It is understood that the housing 200 may also include a cover plate 220, and a frame 210 surrounds the electrode core 100. The frame 210 may include a first side wall 211a, a second side wall, a third side wall, and a fourth side wall connected end to end. The cover plate 220 is disposed on both sides in the thickness direction of the electrode core 100. After the cover plate 220 and the frame 210 are connected, they together form the housing 200, thereby defining a receiving cavity 230 inside the housing 200, so that the housing 200 can be used to encapsulate the electrode core 100 and the electrolyte.

[0077] The electrode core 100 may include an electrode core body 110, a first electrode tab 120 and a second electrode tab 130 with opposite polarities. The first electrode tab 120 and the second electrode tab 130 are arranged along a first direction. Both the first electrode tab 120 and the second electrode tab 130 are electrically connected to the electrode core body 110, so that one of the first electrode tab 120 and the second electrode tab 130 is used to lead out the positive electrode of the electrode core body 110, and the other of the first electrode tab 120 and the second electrode tab 130 is used to lead out the negative electrode of the electrode core body 110.

[0078] Specifically, the electrode core 110 can be composed of a positive electrode, a separator, and a negative electrode stacked in sequence, so that the lithium ions / sodium ions released from the positive electrode migrate through the electrolyte and embed into the negative electrode, thereby enabling the electrode core 110 to achieve the discharge function, and thus enabling the electrode core 110 to supply power to the electrical device.

[0079] For example, the first tab 120 is connected to the negative electrode plate, thereby leading out the negative electrode of the core body 110, and the second tab 130 is connected to the positive electrode plate, thereby leading out the positive electrode of the core body 110. Alternatively, the first tab 120 is connected to the positive electrode plate, thereby leading out the positive electrode of the core body 110, and the second tab 130 is connected to the negative electrode plate, thereby leading out the negative electrode of the core body 110.

[0080] It is understandable that when the housing 200 is energized, the first tab 120 is electrically connected to the post 300, and the second tab 130 is connected to the inner side of the second sub-sidewall 2112, thereby making the second tab 130 electrically connected to the second sub-sidewall 2112. The circuit board assembly 500 may have two connection terminals, one of which is electrically connected to the post 300, and the other of which is electrically connected to the second sub-sidewall 2112.

[0081] In this way, both the first tab 120 and the second tab 130 can be electrically connected to the circuit board assembly 500, thereby transmitting the current of the electrode core body 110 to the circuit board assembly 500. The circuit board assembly 500 can be used to monitor the battery's voltage, current, or temperature, thereby ensuring that the battery operates within a safe operating range and improving the battery's performance.

[0082] The injection port 2111a provides an electrolyte injection channel for the battery. During electrolyte injection, an injection needle can be inserted into the injection port 2111a, with a portion of the needle extending into the receiving cavity 230. After electrolyte injection is completed, the injection port 2111a can be sealed by the sealing assembly 400 to prevent electrolyte leakage. The sealing assembly 400 may include a sealing plug 410 and a sealing cap 420. The sealing plug 410 is used to block the injection port 2111a, and the sealing cap 420 is pressed against the outer end face of the sealing plug 410.

[0083] It should be noted that, in this embodiment, the injection hole 2111a is located on the first sub-sidewall 2111, which protrudes outward from the housing 200 relative to the second sub-sidewall 2112. This results in a height difference h between the first sub-sidewall 2111 and the second sub-sidewall 2112 in the second direction. This height difference h is sufficient to avoid the injection needle, allowing it to fully penetrate the housing 200 for convenient electrolyte injection and improved electrolyte wetting effect on the electrode. Simultaneously, the distance between the electrode core body 110 and the second sub-sidewall 2112 can be smaller, thereby increasing the volume of the electrode core body 110 and thus improving the battery's energy density.

[0084] It is understood that the electrode post 300 can be inserted into the housing 200 through the electrode post hole. Part of the structure of the electrode post 300 is located inside the housing 200, and part of the structure of the electrode post 300 is located outside the housing 200. Since the electrode post hole in this embodiment is also provided in the first sub-side wall 2111, after the electrode post 300 is inserted into the electrode post hole, the electrode post 300 located in the housing 200 can also be provided in the space between the first sub-side wall 2111 and the electrode core 100. That is, the height of the electrode post 300 and the height difference h partially overlap, thereby making full use of the space between the first sub-side wall 2111 and the electrode core 100 for liquid injection needle injection and setting of the electrode post 300, thereby improving the volumetric energy density of the battery.

[0085] The battery provided in this embodiment includes an electrode core 100, a housing 200, an electrode post 300, and a sealing assembly 400. The electrode core 100 includes an electrode core body 110 and a first electrode tab 120. The housing 200 includes a frame 210, which includes a first sidewall 211a. The first sidewall 211a includes a first sub-sidewall 2111 and a second sub-sidewall 2112. The first sub-sidewall 2111 includes an injection hole 2111a and an electrode post hole. By configuring the electrode core body 110 for storing or releasing electrical energy, configuring the first electrode tab 120 for drawing out the current from the electrode core body 110, and configuring the electrode post 300 for conductive connection with the first electrode tab 120, the current of the electrode core 100 is drawn out to the outside of the housing 200. By making the first sub-sidewall 2111 protrude relative to the second sub-sidewall 2112 toward the outside of the housing 200, a height difference h is formed between the first sub-sidewall 2111 and the second sub-sidewall 2112 in the second direction, and the injection hole is... The electrode post 2111a and the electrode post hole are located on the first sub-side wall 2111 so that the height difference h allows the injection needle to fully extend into the receiving cavity 230, thereby improving the injection effect. The space where the height difference h is located can accommodate the electrode post 300 and other structural components, thus making full use of the battery space. The injection hole 2111a is located on the first sub-side wall 2111, which can reduce the distance between the electrode core body 110 and the second sub-side wall 2112, thereby increasing the volume of the electrode core body 110 and thus improving the volumetric energy density of the battery.

[0086] In one possible implementation, the second sub-sidewall 2112, the pole hole, and the injection hole 2111a are arranged sequentially along the first direction.

[0087] In other words, the electrode post hole is located in the middle of the first sidewall 211a, while the second sub-sidewall 2112 and the injection hole 2111a are located on either side of the first sidewall 211a. One connection end of the circuit board assembly 500 is connected to the second sub-sidewall 2112, and the other connection end of the circuit board assembly 500 is connected to the electrode post 300. The electrode post hole is positioned close to the second sub-sidewall 2112, which shortens the distance between the two connection ends of the circuit board assembly 500, thereby reducing current transmission loss. Furthermore, the injection hole 2111a is positioned far from the second sub-sidewall 2112, so that after the electrode post 300, the second sub-sidewall 2112, and the circuit board assembly 500 are connected, it will not obstruct the injection of liquid by the injection needle.

[0088] Reference Figure 7 and Figure 8 As shown, in some embodiments, in the second direction, the distance T between the end of the injection hole 2111a facing the core body 110 and the side of the core body 110 facing the first sidewall 211a satisfies: 2 mm ≤ T ≤ 10 mm.

[0089] It should be noted that the injection needle needs to be inserted into the injection hole 2111a and extend into the housing 200 by approximately 1.5 mm. Therefore, to ensure sufficient injection space for the injection needle, T can be greater than or equal to 2 mm, facilitating the insertion of the injection needle into the housing 200 for convenient injection. This allows the electrolyte to fully penetrate the electrode core body 110, thereby improving the wetting effect of the electrolyte on the electrode core body 110. Furthermore, T can be less than or equal to 10 mm to increase the volumetric energy density of the battery.

[0090] Therefore, 2 mm ≤ T ≤ 10 mm ensures that the space between the first sub-sidewall 2111 and the core body 110 can guarantee that the injection needle can be inserted into the housing 200 for injection, and accommodate the first electrode tab 120 and other structural components. The other structural components may include one or more of the first insulating component 600, the second insulating component 700, the conductive connector 800, and the third insulating component 900.

[0091] For example, the distance T between the end of the injection hole 2111a facing the electrode core body 110 and the side of the electrode core body 110 facing the first sidewall 211a can be any one of 2 mm, 4 mm, 6 mm, 8 mm, 10 mm or within any two of the values.

[0092] Reference Figure 6 As shown, in one possible implementation, in the second direction, the height difference h between the first sub-sidewall 2111 and the second sub-sidewall 2112 satisfies: 0.1 mm ≤ h ≤ 3 mm. This arrangement allows sufficient installation space within the housing 200 for the second insulating member 700, the conductive connector 800, and the third insulating member 900, and also improves the volumetric energy density of the battery.

[0093] For example, the height difference h between the first sub-sidewall 2111 and the second sub-sidewall 2112 can be any one of 0.1 mm, 0.5 mm, 1 mm, 2 mm, or 3 mm, or fall within the range of any two values.

[0094] Reference Figures 7 to 11 As shown, in some embodiments, the battery further includes a first insulating member 600 and / or a second insulating member 700. The first insulating member 600 is inserted into the terminal hole, and at least a portion of the first insulating member 600 abuts between the terminal 300 and the terminal hole. The second insulating member 700 is disposed within the housing 200, and at least a portion of the second insulating member 700 abuts between the first tab 120 and the first sidewall 211a.

[0095] It is understandable that the terminal post 300, the first insulating component 600, and the second insulating component 700 can be assembled together by riveting, or the first insulating component 600 can be first set in the terminal post hole, and then the terminal post 300 can be inserted into the first insulating component 600. The terminal post 300 is used to conduct the current of the electrode core 100 to the outside of the housing 200. The first insulating component 600 is used to insulate and isolate the terminal post 300 and the first side wall 211a. The second insulating component 700 is used to insulate and isolate the first tab 120 and the first side wall 211a, thereby preventing the battery from short-circuiting.

[0096] The first insulating member 600 can be sleeved on the outer periphery of the pole post 300, the first insulating member 600 can abut against the pole post 300 and the pole post hole, and the first insulating member 600 can be folded towards the outside of the pole post 300, so that the first insulating member 600 can abut against the outside wall of the pole post 300 and the first side wall 211a.

[0097] The second insulating member 700 can be completely abutted between the first tab 120 and the first sidewall 211a, or the second insulating member 700 can be sleeved on the outside of the first tab 120, so that part of the second insulating member 700 abuts between the first tab 120 and the first sidewall 211a.

[0098] Reference Figure 8 As shown, in one possible implementation, the battery further includes a third insulating member 900, at least a portion of which abuts against the side of the second insulating member 700 near the electrode core body 110, and the third insulating member 900 surrounds the outside of the first electrode tab 120, thereby spatially isolating the first electrode tab 120 from the housing 200 through the third insulating member 900, and improving the insulation performance between the first electrode tab 120 and the housing 200.

[0099] Reference Figure 11 As shown, it should be noted that the battery may also include a conductive connector 800, which is disposed within the housing 200. The first tab 120 is conductively connected to the terminal post 300 via the conductive connector 800. Thus, the conductive connector 800 acts as a bridge between the first tab 120 and the terminal post 300, thereby ensuring that current can be smoothly transmitted from the electrode core 100 to the external circuit. The second insulating member 700 can abut between the conductive connector 800 and the first sidewall 211a to insulate the conductive connector 800 from the housing 200.

[0100] Reference Figure 6 As shown, in one possible implementation, in the first direction, the extension length L of the first sub-sidewall 2111 satisfies: 5 mm ≤ L ≤ 30 mm.

[0101] It should be noted that the injection hole 2111a and the electrode hole need to occupy a certain space. In order to ensure that the first sub-sidewall 2111 has enough space for setting the injection hole 2111a and the electrode hole, the extension length L of the first sub-sidewall 2111 can be greater than or equal to 5 mm. At the same time, given the limited length of the first sidewall 211a, it is necessary to ensure that the second sub-sidewall 2112 has enough space for connecting the connection end of the circuit board assembly 500. Therefore, the extension length L of the first sub-sidewall 2111 can be less than or equal to 30 mm.

[0102] Specifically, refer to Figure 3 As shown, the receiving cavity 230 may include a first chamber 231 and a second chamber 232 that are interconnected. A first sub-sidewall 2111 forms at least a portion of the side surface of the first chamber 231, and a second sub-sidewall 2112 forms at least a portion of the side surface of the second chamber 232. A second insulating member 700, a conductive connector 800, and a third insulating member 900 may be received in the first chamber 231, and the electrode core 100 is received in the second chamber 232.

[0103] It should be noted that when the height difference h is large, or when the thickness of the second insulating member 700, the conductive connector 800 and the third insulating member 900 is thin, the electrode core body 110 can be made into an irregular shape. For example, part of the structure of the electrode core body 110 protrudes towards the first chamber 231. In this case, the electrode core 100 can also be housed in the first chamber 231 to make full use of the space of the housing 230, thereby increasing the volume of the electrode core 100 and thus improving the volumetric energy density of the battery.

[0104] Reference Figure 3 , Figure 4 As shown, in one possible implementation, the housing 200 further includes two cover plates 220, which are respectively connected to both sides of the first sidewall 211a in the width direction.

[0105] The side of the cover plate 220 facing the first sidewall 211a includes a first region 221. The projection of the first region 221 along the thickness direction of the cover plate 220 is located inside the frame 210. The second sidewall, the first sub-sidewall 2111, and the first region 221 define a first chamber 231 inside the housing 200.

[0106] Both cover plates 220 and the frame 210 are made of metal, such as stainless steel, titanium alloy, nickel alloy, chromium alloy or aluminum alloy. The frame 210 and the cover plate 220 are welded together to improve the structural strength of the shell 200. The specific materials of the frame 210 and the cover plate 220 can be the same or different.

[0107] For example, both cover plates 220 and the frame 210 are made of titanium alloy, which helps to reduce the weight of the housing 200, thereby achieving lightweighting of the housing 200 and improving the strength of the housing 200.

[0108] It is understood that when the battery includes a terminal post 300, a first insulating member 600, a second insulating member 700, and a conductive connector 800, the first chamber 231 can be used to accommodate the second insulating member 700 and the conductive connector 800. When the battery includes a terminal post 300, a first insulating member 600, a second insulating member 700, a third insulating member 900, and a conductive connector 800, the first chamber 231 can be used to accommodate the second insulating member 700, the third insulating member 900, and the conductive connector 800.

[0109] In this way, the first chamber 231 can be used to accommodate the second insulating member 700, the conductive connector 800 and the third insulating member 900, and the first chamber 231 can provide a liquid injection space for the injection needle, thereby reducing the distance between the core body 110 and the second sub-side wall 2112, thereby increasing the volume of the core body 110.

[0110] Reference Figures 2 to 4 As shown, in one possible implementation, the cover plate 220 further includes a second region 222 on the side facing the first sidewall 211a. The first region 221 and the second region 222 are arranged along a first direction. The projection of the second region 222 along the thickness direction of the cover plate 220 is located outside the frame 210. The second sub-sidewall 2112 and the second region 222 define a recess 240 on the outside of the housing 200. The recess 240 is used to accommodate the circuit board assembly 500 to protect the circuit board assembly 500.

[0111] Reference Figure 1 As shown, it can be understood that the circuit board assembly 500 may include a substrate 510, a first connection terminal 520, and a second connection terminal 530. Both the first connection terminal 520 and the second connection terminal 530 are electrically connected to the substrate 510. The first connection terminal 520 is electrically connected to the pole post 300, and the second connection terminal 530 is electrically connected to the second sub-sidewall 2112. This allows the current of the first tab 120 to be transmitted to the first connection terminal 520, and the current of the second tab 130 to be transmitted to the second connection terminal 530 through the second sub-sidewall 2112. This facilitates the circuit board assembly 500 in monitoring the voltage and current of the pole core 100.

[0112] In this embodiment, the second sub-sidewall 2112 and the second region 222 together define a recess 240 on the outside of the receiving cavity 230, so that the substrate 510 and the second connection terminal 530 can be disposed in the recess 240, thereby protecting the circuit board assembly 500 and reducing the probability of the circuit board assembly 500 being damaged by impact when the battery is subjected to impact.

[0113] In some embodiments, the first connecting terminal 520 and the second connecting terminal 530 are located on opposite sides of the substrate 510 along a first direction, and the pole hole is located on the side of the first sub-sidewall 2111 near the first connecting terminal 520. In this way, the distance from the first connecting terminal 520 to the pole 300 can be shortened, thereby shortening the length of the first connecting terminal 520 and reducing material costs.

[0114] Reference Figure 10 As shown, in some embodiments, the projection of the injection hole 2111a along the second direction is located within the projection of the second insulating member 700 along the second direction. The second insulating member 700 has a first clearance hole 710 that penetrates both sides of the second insulating member 700 along the second direction.

[0115] It is understandable that when the extension length L of the first sub-sidewall 2111 is small, in order to facilitate assembly, the projection of the second insulating member 700 along the second direction will cover the projection of the injection hole 2111a along the second direction. Therefore, the second insulating member 700 can be provided with a first clearance hole 710. The injection hole 2111a and the first clearance hole 710 are connected, so that the electrolyte can wet the electrode core body 110 through the first clearance hole 710, thereby improving the wetting effect of the electrolyte on the electrode core body 110.

[0116] In one possible implementation, the projection of the injection hole 2111a along the second direction at least partially coincides with the projection of the first clearance hole 710 along the second direction.

[0117] This design shortens the flow path of the electrolyte from the injection hole 2111a to the electrode core body 110, thereby allowing the electrolyte to flow fully into the interior of the electrode core body 110 and improving the wetting effect of the electrolyte on the electrode core body 110.

[0118] In one possible implementation, the projection of the injection hole 2111a along the second direction is located within the projection of the third insulating member 900 along the second direction. The third insulating member 900 has a second clearance hole that extends through both sides of the third insulating member 900 along the second direction, and the projection of the injection hole 2111a along the second direction at least partially coincides with the projection of the second clearance hole along the second direction.

[0119] In other words, when the second insulating member 700 and the third insulating member 900 are provided simultaneously between the first sidewall 211a and the first electrode tab 120, the second insulating member 700 and the third insulating member 900 can jointly insulate the isolation shell 200 and the first electrode tab 120, thereby improving the insulation effect. If the extension length L of the first sub-sidewall 2111 is small, the projection of the third insulating member 900 along the second direction can cover the projection of the injection hole 2111a along the second direction, so as to facilitate the assembly of the third insulating member 900. A second clearance hole is opened on the third insulating member 900, so that the electrolyte can flow to the electrode core body 110 through the second clearance hole, thereby improving the wetting effect of the electrolyte on the electrode core body 110.

[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery assembly, characterized in that, include: A battery, the battery including an electrode core (100) and a housing (200), the electrode core (100) being housed within the housing (200); The housing (200) includes a plurality of sidewalls (211), at least one of the sidewalls (211) includes a first sub-sidewall (2111) and a second sub-sidewall (2112), the first sub-sidewall (2111) and the second sub-sidewall (2112) have a height difference h in a second direction, and in the second direction, the first sub-sidewall (2111) is farther away from the pole core (100) relative to the second sub-sidewall (2112), and the first sub-sidewall (2111) is provided with a liquid injection hole (2111a). At least one pole post (300) is disposed on the first sub-sidewall (2111). A circuit board assembly (500), at least a portion of which is located on the side of the second sub-sidewall (2112) away from the pole core (100), is electrically connected to the circuit board assembly (500) and the pole core (100).

2. The battery assembly according to claim 1, characterized in that, The outer side of the housing (200) has a recess (240), the second sub-sidewall (2112) forms at least a portion of the side surface of the recess (240), and at least a portion of the circuit board assembly (500) is housed in the recess (240).

3. The battery assembly according to claim 1, characterized in that, The first sub-sidewall (2111) is also provided with at least one pole post hole, and the pole post (300) is provided in the pole post hole.

4. The battery assembly according to claim 1, characterized in that, The electrode core (100) includes an electrode core body (110). In a second direction, there is a gap between the side of the electrode post (300) near the electrode core body (110) and the side of the electrode core body (110) near the electrode post (300). The electrode post (300) is electrically connected to the electrode core body (110), and the end of the electrode post (300) away from the electrode core (100) is electrically connected to the circuit board assembly (500).

5. The battery assembly according to claim 1, characterized in that, It also includes a sealing assembly (400) disposed at the injection hole (2111a) and sealing the injection hole (2111a).

6. The battery assembly according to claim 1, characterized in that, The housing (200) has a receiving cavity (230), which includes a first chamber (231) and a second chamber (232) that are in communication with each other. The first sub-sidewall (2111) forms at least a portion of the side surface of the first chamber (231), and the second sub-sidewall (2112) forms at least a portion of the side surface of the second chamber (232). The pole core (100) is housed in the second chamber (232).

7. The battery assembly according to claim 1, characterized in that, The first sub-sidewall (2111) and the second sub-sidewall (2112) are arranged along the first direction.

8. The battery assembly according to claim 7, characterized in that, In the first direction, the length L of the first sub-sidewall (2111) satisfies: L≥5mm.

9. The battery assembly according to claim 7, characterized in that, The second sub-sidewall (2112), the pole (300), and the injection hole (2111a) are arranged sequentially along the first direction.

10. The battery assembly according to claim 1, characterized in that, The electrode core (100) includes an electrode core body (110). In a second direction, the injection hole (2111a) penetrates the first sub-sidewall (2111). There is a distance T between the side of the injection hole (2111a) facing the electrode core body (110) and the side of the electrode core body (110) facing the injection hole (2111a). The distance T satisfies: 2 mm ≤ T ≤ 10 mm.

11. The battery assembly according to claim 1, characterized in that, In the second direction, the height difference h satisfies: 0.1 mm ≤ h ≤ 3 mm.

12. The battery assembly according to any one of claims 1-11, characterized in that, The pole (300) and the housing (200) are insulated from each other.

13. The battery assembly according to claim 12, characterized in that, It also includes a first insulating member (600), which has a through hole; The first sub-sidewall (2111) is provided with a pole hole, and the first insulating member (600) is inserted into the pole hole and abuts between the pole (300) and the pole hole, so as to insulate the pole (300) and the first sub-sidewall (2111).

14. The battery assembly according to any one of claims 1-11, characterized in that, It also includes a conductive connector (800), which is disposed between the electrode core (100) and the electrode post (300) and is electrically connected to the electrode core (100) and the electrode post (300) respectively.

15. The battery assembly according to claim 14, characterized in that, It also includes a second insulating element (700), at least a portion of which is disposed between the conductive connector (800) and the first sub-sidewall (2111) to insulate the conductive connector (800) and the first sub-sidewall (2111).

16. The battery assembly according to claim 15, characterized in that, The second insulating member (700) is also provided with a first clearance hole (710), which is correspondingly provided with the liquid injection hole (2111a) so that the first clearance hole (710) is suitable for communicating with the liquid injection hole (2111a) and the electrode core (100).

17. The battery assembly according to claim 15, characterized in that, It also includes a third insulating element (900), the pole core (100) includes a pole core body (110) and a first tab (120), the first tab (120) being connected to the side of the pole core body (110) near the pole post (300); The third insulating member (900) is located on the side of the second insulating member (700) near the pole core (100), at least a portion of the third insulating member (900) abuts against the side of the second insulating member (700) near the pole core (100), and the third insulating member (900) surrounds the outside of the first pole tab (120) to insulate and isolate the first pole tab (120) from the housing (200).

18. The battery assembly according to any one of claims 1-11, characterized in that, The material of the housing (200) includes at least one of titanium alloy, stainless steel, nickel alloy, chromium alloy and aluminum alloy.

19. The battery assembly according to any one of claims 1-11, characterized in that, The first sub-sidewall (2111) is provided with two pole posts (300), and both pole posts (300) are electrically connected to the pole core (100), and the polarities of the two pole posts (300) are opposite; Alternatively, there may be one pole (300), and both the pole (300) and the housing (200) may be electrically connected to the pole core (100), with the pole (300) and the housing (200) having opposite polarities.

20. The battery assembly according to claim 19, characterized in that, The circuit board assembly (500) includes a substrate (510), a first connection terminal (520) and a second connection terminal (530). One end of the first connection terminal (520) and one end of the second connection terminal (530) are both electrically connected to the substrate (510). The other end of the first connection terminal (520) is electrically connected to the pole post (300), and the other end of the second connection terminal (530) is electrically connected to the housing (200) or to another pole post (300).

21. The battery assembly according to claim 20, characterized in that, The electrode core (100) includes an electrode core body (110), a first electrode tab (120), and a second electrode tab (130). One of the first electrode tab (120) and the second electrode tab (130) is a positive electrode, and the other is a negative electrode. Both the first electrode tab (120) and the second electrode tab (130) are electrically connected to the electrode core body (110). The first tab (120) is electrically connected to the pole (300), the second tab (130) is electrically connected to the housing (200), and the second connection terminal (530) is electrically connected to the housing (200).

22. The battery assembly according to claim 21, characterized in that, The second electrode (130) and the second sub-sidewall (2112) are electrically connected.

23. The battery assembly according to claim 20, characterized in that, The first connection terminal (520) and the second connection terminal (530) are located on opposite sides of the substrate (510) along the first direction; The pole post (300) is located on the side of the first sub-sidewall (2111) near the first connecting terminal (520).

24. An electrical appliance, characterized in that, It includes an electrical device and a battery assembly as described in any one of claims 1-23, the battery assembly being used to supply power to the electrical device.

Images