Blade battery and electric device

Abstract

The utility model belongs to the technical field of power batteries, and particularly relates to a blade battery and an electric device. The blade battery comprises at least two blade battery modules which are arranged in a stacked mode, each blade battery module comprises a blade battery assembly and an end plate assembly, each end plate assembly comprises a first end plate and a second end plate, and the first end plates and the second end plates are arranged on the two opposite sides of the blade battery assemblies in the first direction respectively. A first clamping part and a second clamping part are respectively arranged on two opposite sides of the first end plate and two opposite sides of the second end plate along the stacking direction of the at least two blade battery modules, the first clamping part is clamped and matched with the adjacent second clamping part, and the first direction is vertical to the stacking direction. According to the blade battery provided by the utility model, the battery capacity of the whole blade battery can be improved, and the stability between the blade battery modules and the accuracy of the connection position can be ensured.

Description

Technical Field

[0001] This utility model belongs to the field of power battery technology, specifically relating to a blade battery and an electrical device. Background Technology

[0002] The battery module end plate is a key structural component of the power battery pack. It can support the battery cells and ensure the structural stability of the battery cells during use by being fixedly connected to the battery pack. It can also protect the battery cells in the event of collisions or compression.

[0003] Blade batteries are a type of prismatic battery cell, featuring an innovative battery packaging structure. Their name comes from their elongated, blade-like shape. Blade batteries boast high volumetric and energy densities, and offer good safety, passing nail penetration tests without catching fire or exploding. Their installation volume has surged in recent years. However, while integrating blade batteries directly into battery packs improves volume utilization and energy density, it also results in lower overall pack reliability. Utility Model Content

[0004] The purpose of this invention is to at least solve the problem of poor overall connection reliability in existing battery packs. This purpose is achieved through the following technical solution:

[0005] The first aspect of this utility model provides a blade battery, comprising at least two stacked blade battery modules, wherein the blade battery modules include:

[0006] Blade battery assembly;

[0007] An end plate assembly, comprising a first end plate and a second end plate, wherein the first end plate and the second end plate are respectively disposed on opposite sides of the blade battery assembly along a first direction. Along the stacking direction of at least two blade battery modules, the opposite sides of the first end plate and the opposite sides of the second end plate are respectively provided with a first latching portion and a second latching portion, wherein the first latching portion and the adjacent second latching portion latch into each other, and the first direction is perpendicular to the stacking direction.

[0008] According to the blade battery of this utility model, multiple stacked blade battery modules are used, and adjacent blade battery modules can be engaged through a first snap-fit ​​part and a second snap-fit ​​part to achieve positioning and connection. This can not only improve the overall battery capacity of the blade battery, but also ensure the stability between each blade battery module and the accuracy of the connection position, thereby improving the overall battery connection reliability. Furthermore, the first end plate and the second end plate can fix and protect the opposite sides of the blade battery assembly.

[0009] In addition, the blade battery according to this utility model may also have the following additional technical features:

[0010] In some embodiments of this utility model, the first end plate and the second end plate are respectively provided with a plurality of connection holes at intervals. The connection holes are used to connect at least two blade battery modules, and the axis of the connection holes extends along the stacking direction.

[0011] In some embodiments of this utility model, the first end plate and the second end plate are respectively provided with a plurality of mounting holes at intervals. The mounting holes are used to fix the blade battery on the battery box, and the axis of the mounting holes extends along the stacking direction.

[0012] In some embodiments of this utility model, the side of the first end plate opposite to the blade battery assembly and the side of the second end plate opposite to the blade battery assembly are respectively provided with a hoisting structure.

[0013] In some embodiments of this utility model, the blade battery module further includes cable ties, which are sleeved on the blade battery assembly, the first end plate, and the second end plate.

[0014] In some embodiments of this utility model, the first end plate on the side opposite to the blade battery assembly and the second end plate on the side opposite to the blade battery assembly are respectively provided with limiting bosses, and the limiting bosses abut against one side of the cable tie.

[0015] In some embodiments of this utility model, multiple cable ties and multiple limiting protrusions are provided, and the limiting protrusions and cable ties correspond one-to-one.

[0016] In some embodiments of this utility model, a partition plate is provided between the first end plate and the blade battery assembly, and between the second end plate and the blade battery assembly.

[0017] In some embodiments of this utility model, the first snap-fit ​​part is a boss structure, and the second snap-fit ​​part is a groove structure, wherein the boss structure and the groove structure are snap-fitted together.

[0018] The second aspect of this utility model provides an electrical device, including a blade battery, which is used to provide electrical energy, and the blade battery is the aforementioned blade battery. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0020] Figure 1 A schematic diagram of the structure of a blade battery module according to an embodiment of the present invention is shown.

[0021] Figure 2 for Figure 1 Exploded view of the blade battery module;

[0022] Figure 3 for Figure 2 A schematic diagram of the structure of the first end plate of the blade battery module;

[0023] Figure 4 for Figure 2 A schematic diagram of the blade battery structure in the blade battery module;

[0024] Figure 5 for Figure 2 A schematic diagram of the blade battery structure from another perspective of the blade battery module.

[0025] The labels in the attached diagram are as follows:

[0026] 100. Blade Battery Module;

[0027] 11. First end plate; 111. First snap-fit ​​part; 112. Connecting hole; 113. Mounting hole; 1131. Channel structure; 114. Lifting structure; 115. Limiting boss; 12. Second end plate;

[0028] 20. Blade battery assembly; 21. Blade battery cell; 211. Battery casing; 212. Positive terminal; 213. Negative terminal; 214. Explosion-proof valve;

[0029] 30. Cable ties;

[0030] 40. Divider. Detailed Implementation

[0031] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0032] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0033] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0034] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0035] The battery module end plate is a key structural component of the power battery pack. It can support the battery cells and ensure the structural stability of the battery cells during use by being fixedly connected to the battery pack. It can also protect the battery cells in the event of collisions or compression.

[0036] Blade batteries are a type of prismatic battery cell, featuring an innovative battery packaging structure. Their elongated, blade-like shape gives them their name. Blade batteries also boast high volumetric and energy densities, excellent safety (passing a nail penetration test without catching fire or exploding), and have seen a significant increase in installed capacity in recent years.

[0037] Blade batteries often adopt a CTP (Cell to Pack) structure, where the battery is directly integrated into the battery pack. While this can improve volume utilization and energy density, it also results in poor battery pack installation and maintainability, necessitating the search for a better solution.

[0038] Figure 1 A schematic diagram of the structure of a blade battery module 100 according to an embodiment of the present invention is shown. Figure 2 for Figure 1 An exploded view of the blade-shaped battery module 100. Figure 1 and 2 As shown, this utility model proposes a blade battery and a power-consuming device. The blade battery of this utility model includes at least two stacked blade battery modules 100. Each blade battery module 100 includes a blade battery assembly 20 and an end plate assembly. The end plate assembly includes a first end plate 11 and a second end plate 12. The first end plate 11 and the second end plate 12 are respectively disposed on opposite sides of the blade battery assembly 20 along a first direction. Along the stacking direction of the at least two blade battery modules 100, the opposite sides of the first end plate 11 and the opposite sides of the second end plate 12 are respectively provided with a first latching portion 111 and a second latching portion. The first latching portion 111 and the adjacent second latching portion are latched together. The first direction is perpendicular to the stacking direction.

[0039] Specifically, in this embodiment, the first end plate 11 and the blade battery module 100, and the second end plate 12 and the blade battery module 100 are assembled by connection processes such as welding or bonding.

[0040] According to the blade battery of this utility model, multiple stacked blade battery modules 100 are used, and adjacent blade battery modules 100 can be engaged with each other through the first snap-fit ​​part 111 and the second snap-fit ​​part, thereby achieving positioning and connection. This can not only improve the overall battery capacity of the blade battery, but also ensure the stability and connection accuracy of each blade battery module 100, thereby improving the overall battery connection reliability. Furthermore, the first end plate 11 and the second end plate 12 can fix and protect the opposite sides of the blade battery assembly 20.

[0041] In some embodiments of this utility model, such as Figure 3As shown, the first end plate 11 and the second end plate 12 are respectively provided with a plurality of connection holes 112 at intervals. The connection holes 112 are used to connect at least two blade battery modules 100, and the axis of the connection holes 112 extends along the stacking direction. In this embodiment, the plurality of blade battery modules 100 are stacked together and can be connected and positioned by the first snap-fit ​​part 111 and the second snap-fit ​​part. The connection holes 112 can further improve the connection strength between the plurality of blade battery modules 100 and improve the overall stability of the blade battery.

[0042] Specifically, in this embodiment, there are four connecting holes 112, which are spaced apart along the second direction, and the first direction, the second direction and the stacking direction are perpendicular to each other.

[0043] In some embodiments of this utility model, such as Figure 3 As shown, the first end plate 11 and the second end plate 12 are respectively provided with a plurality of mounting holes 113 at intervals. The mounting holes 113 are used to fix the blade battery to the battery housing, and the axis of the mounting holes 113 extends along the stacking direction. In this embodiment, each blade battery module 100 can be connected by bolts or other connecting parts, and multiple blade battery modules 100 can be fixed to the battery housing, thereby realizing the connection between the battery housing and the blade battery.

[0044] Specifically, in this embodiment, as shown in the figure, a groove structure 1131 is provided circumferentially at one end of the mounting hole 113. The groove structure 1131 can prevent bolts and other connecting parts from interfering with adjacent blade battery modules 100 when they are connected to the blade battery module 100, thereby causing damage to the adjacent blade battery module 100.

[0045] In some embodiments of this utility model, such as Figure 3 As shown, the first end plate 11 and the second end plate 12, respectively, are provided with lifting structures 114 arranged along a first direction on the side opposite to the blade battery assembly 20. Multiple lifting structures 114 are provided, spaced apart, with the first direction being the direction from the first end plate 11 towards the second end plate 12. In this embodiment, the lifting structures 114 facilitate the gripping mechanism to grasp the entire blade battery, thereby enabling operations such as movement.

[0046] Specifically, in this embodiment, the lifting structure 114 is an elongated hole, the extension direction of which is the same as the second direction, and there are six of them. The six lifting structures 114 are distributed on the entire side of the first end plate 11 and / or the second end plate 12 away from the blade battery assembly 20, and are spaced apart. The area enclosed by the six lifting structures 114 can be very close to the cross-section of the first end plate 11 and / or the second end plate 12, which facilitates the lifting equipment to lift.

[0047] Specifically, in this embodiment, the hoisting structure 114 can also be replaced by a hoisting slot, and the hoisting equipment can be engaged with the hoisting slot to move the entire blade battery.

[0048] Specifically, in this embodiment, the hoisting structure 114 can also be a protrusion, which also enables the hoisting equipment to engage with the protrusion, thereby enabling the movement of the entire blade battery.

[0049] Specifically, the number of cable ties can be 2-10, and designers can adjust it according to the system design requirements.

[0050] In some embodiments of this utility model, such as Figure 3 As shown, the blade battery module 100 also includes cable ties 30, which are sleeved on the blade battery assembly 20, the first end plate 11, and the second end plate 12. In this embodiment, two cable ties 30 are provided, respectively spaced apart and sleeved on the outside of the blade battery module 100, and the inner surfaces of the cable ties 30 are respectively in contact with the blade battery assembly 20, the first end plate 11, and the second end plate 12. In addition, the two cable ties 30 can also stably bind the blade battery module 100, improving the overall stability of the blade battery module 100.

[0051] In some embodiments of this utility model, such as Figure 3 As shown, the first end plate 11 and the second end plate 12, respectively, are provided with limiting bosses 115 on the side opposite to the blade battery assembly 20, and the limiting bosses 115 abut against one side of the cable tie 30. In this embodiment, the limiting bosses 115 are arranged along the stacking direction and abut against one side of the cable tie 30, which can limit the cable tie 30, thereby preventing the cable tie 30 from sliding when the blade battery module 100 moves, thus improving reliability.

[0052] Specifically, in this embodiment, such as Figure 3 As shown, there are two limiting protrusions 115. Along the second direction, the two limiting protrusions 115 are spaced apart and located between the two cable ties 30 respectively. The two limiting protrusions 115 can limit one side of the cable tie 30 respectively, preventing the cable tie 30 from sliding and improving reliability.

[0053] In some embodiments of this utility model, multiple cable ties 30 and multiple limiting protrusions 115 are provided, with each limiting protrusion 115 corresponding to a cable tie 30. For example... Figure 3 As shown, in this embodiment, the corresponding cooperation of multiple limiting bosses 115 and multiple cable ties 30 can not only improve the binding force and stability of the blade battery module 100, but also prevent the multiple cable ties 30 from sliding, thereby improving reliability.

[0054] In some embodiments of this utility model, such as Figure 3 As shown, partition plates 40 are respectively provided between the first end plate 11 and the blade battery assembly 20, and between the second end plate 12 and the blade battery assembly 20. In this embodiment, the partition plates 40 can improve the torsional rigidity of the overall blade battery module 100 and ensure the side impact strength. In addition, the partition plates 40 can separate the blade battery assembly 20 and the end plate, and play a certain role in insulation.

[0055] In some embodiments of this utility model, as shown in the figure, the first snap-fit ​​part 111 is a boss structure (which can be a rectangular or circular geometric structure, etc.), and the second snap-fit ​​part is a groove structure. The boss structure and the groove structure are snap-fitted together. In this embodiment, the snap-fitting of the boss structure and the groove structure can realize the positioning and connection between the stacked blade battery modules 100, thereby improving the overall stability of the blade battery.

[0056] Furthermore, such as Figure 4 and 5 As shown, the blade battery assembly 20 includes multiple blade battery cells 21 arranged along a first direction, which are connected in series or parallel. Each blade battery cell 21 includes a battery casing 211, an explosion-proof valve 214 (which can be circular, elliptical, rectangular, or other geometric shapes), a positive terminal 212, and a negative terminal 213. The battery casing 211 serves as a heat dissipation surface for battery cooling. Along a second direction, the positive terminal 212 and the negative terminal 213 are respectively located on opposite sides of the battery casing 211, realizing positive and negative input and output. The explosion-proof valve 214 is located on the battery casing 211 and automatically opens when the battery is over-voltaged or over-temperatured, directly dissipating the internal high-pressure gas, thereby achieving explosion prevention.

[0057] Specifically, such as Figure 4 and 5 As shown, the number of blade battery cells 21 in the blade battery can be 2-100. They are constrained by a frame formed by cable ties 30, the first end plate 11 and the second end plate 12. The blade battery cells 21 are fixed together by adhesive to ensure the reliability of the blade battery in use.

[0058] Furthermore, in this embodiment, the end plate assembly and blade battery assembly 20 of the blade battery in this utility model have a simple structure, which can ensure the reliable fixation of the entire blade battery and the reliable connection between the blade battery and the battery box. The operation is simple and the cost is low, which has a positive effect on improving the overall mechanical performance of the battery pack, reducing the cost of the battery pack, and increasing the energy density.

[0059] This utility model also proposes an electrical device, including the aforementioned blade battery, for providing electrical energy.

[0060] According to the blade battery of the power device of this utility model, multiple stacked blade battery modules 100 are used, and adjacent blade battery modules 100 can be engaged with each other through the first snap-fit ​​part 111 and the second snap-fit ​​part, thereby achieving positioning and connection. This can not only improve the overall battery capacity of the blade battery, but also ensure the stability and connection accuracy of each blade battery module 100, thereby improving the overall battery connection reliability. Furthermore, the first end plate 11 and the second end plate 12 can fix and protect the opposite sides of the blade battery assembly 20.

[0061] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A blade battery, characterized in that: The invention comprises at least two blade battery modules stacked together, wherein the blade battery module comprises: Blade battery assembly; An end plate assembly, the end plate assembly includes a first end plate and a second end plate, the first end plate and the second end plate are respectively arranged on opposite sides of the blade battery assembly along a first direction, along the stacking direction of at least two blade battery modules, the opposite sides of the first end plate and the opposite sides of the second end plate are respectively provided with a first clamping portion and a second clamping portion, the first clamping portion and the adjacent second clamping portion are clamped together, and the first direction is perpendicular to the stacking direction.

2. The blade battery according to claim 1, characterized in that: The first end plate and the second end plate are respectively provided with a plurality of connection holes at intervals, and the connection holes are used to connect at least two of the blade battery modules, and the axes of the connection holes extend along the stacking direction.

3. The blade battery according to claim 1, characterized in that: The first end plate and the second end plate are respectively provided with a plurality of mounting holes at intervals, the mounting holes are used to fix the blade batteries on the battery box, and the axes of the mounting holes extend along the stacking direction.

4. The blade battery according to claim 1, characterized in that: A side of the first end plate facing away from the blade battery assembly and a side of the second end plate facing away from the blade battery assembly are respectively provided with a hoisting structure.

5. The blade battery according to claim 1, characterized in that: The blade battery module also includes a cable tie, which is sleeved on the blade battery assembly, the first end plate and the second end plate.

6. The blade battery according to claim 5, characterized in that: A side of the first end plate facing away from the blade battery assembly and a side of the second end plate facing away from the blade battery assembly are respectively provided with limiting bosses, and the limiting bosses abut against one side of the cable tie.

7. The blade battery according to claim 6, characterized in that: There are a plurality of cable ties, and a plurality of limiting bosses, and the limiting bosses correspond to the cable ties one by one.

8. The blade battery according to claim 1, characterized in that: A partition plate is provided between the first end plate and the blade battery assembly and between the second end plate and the blade battery assembly, respectively.

9. The blade battery according to claim 1, characterized in that: The first clamping portion is a boss structure, and the second clamping portion is a groove structure, and the boss structure and the groove structure are clamped and matched.

10. An electrical device, characterized in that: It comprises a blade battery, which is used to provide electrical energy. The blade battery is the blade battery according to any one of claims 1 to 9.

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