Battery pack, thermal insulation assembly, and electric device

Abstract

The utility model discloses a battery pack, heat insulation subassembly and electric device, wherein, battery pack includes casing, a plurality of battery monomer and heat insulation subassembly, and casing defines and holds the cavity, and a plurality of battery monomer arranges in the holding cavity along the first direction, and is equipped with heat insulation subassembly between at least two adjacent battery monomers, and heat insulation subassembly includes first board body, second board body and heat insulation board, and first board body and second board body respectively towards adjacent battery monomer exert the action force away from each other, and heat insulation board is located between first board body and second board body. The battery pack of utility model embodiment, through setting first board body and second board body to respectively towards adjacent battery monomer exert the action force away from each other, makes first board body and second board body can compress the battery monomer, is favorable to the effective transmission of ion and electron in battery monomer, can also avoid heat insulation board to be pressed to break down, guarantees the good heat insulation effect of heat insulation board.

Description

Technical Field

[0001] This utility model relates to the field of solid-state battery technology, and in particular to a battery pack, a heat insulation component, and an electrical device. Background Technology

[0002] With the development of electric vehicles, energy storage, electric aviation, smart terminals, and national security, the market demand for high-energy-density, high-safety, long-life, and low-cost lithium batteries is becoming increasingly urgent. Existing lithium-ion batteries, limited by flammable liquid electrolytes, struggle to meet these multiple performance requirements. Solid-state batteries, with their advantages, demonstrate enormous market potential and technological prospects, and are globally recognized as the key to disrupting existing lithium-ion battery technology.

[0003] Since solid-state battery cells do not contain electrolyte, a certain pressure (pre-tightening force) needs to be applied to the solid-state battery cells to make contact between the electrodes and the solid electrolyte interface, so as to realize the transfer of ions and electrons in the battery cells and enable the battery cells to generate electrical energy.

[0004] To prevent the heat generated by the runaway battery cell from spreading to adjacent normal battery cells, a heat insulation plate needs to be installed between the two battery cells. However, in order to ensure the high efficiency of ion and electron transport between the electrode and the solid electrolyte interface, a certain pre-tightening force needs to be applied to the outside of the battery cell. The existing structure of the heat insulation plate is easily crushed by the pre-tightening force applied to the battery cell. Utility Model Content

[0005] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a battery pack that can not only ensure its own working performance, but also prevent the heat insulation plate from being crushed, thus ensuring the heat insulation effect of the heat insulation plate. This solves the technical problem in the prior art where the structure of the heat insulation plate is easily crushed by the pre-tightening force applied to the outside of the battery cell, resulting in poor heat insulation effect of the heat insulation plate.

[0006] The second objective of this invention is to provide a heat insulation component.

[0007] The third objective of this invention is to provide an electrical device having the aforementioned battery pack or heat insulation components.

[0008] A battery pack according to an embodiment of the present invention includes: a housing defining a receiving cavity; a plurality of battery cells arranged in the receiving cavity along a first direction; and a heat insulation assembly disposed between at least two adjacent battery cells. The heat insulation assembly includes a first plate, a second plate, and a heat insulation plate. The first plate and the second plate respectively exert a force toward the adjacent battery cells, moving away from each other. The heat insulation plate is located between the first plate and the second plate.

[0009] According to the battery pack of this utility model embodiment, by setting the first plate and the second plate to apply forces away from each other to adjacent battery cells, these forces can respectively compress the battery cells. Since the electrodes and solid electrolyte in the battery cells have a "solid-solid" contact, applying forces to adjacent battery cells can deform the solid components, making the contact between the interfaces inside the battery cells, such as the electrode-electrolyte interface, tighter. This can reduce poor contact and porosity between the electrode-electrolyte interface to a certain extent, thereby improving the transport efficiency of ions and electrons, reducing the resistance between the electrode-electrolyte interface, and thus improving the overall performance of the battery pack. At the same time, by setting the heat insulation plate between the first plate and the second plate, the first plate and the second plate will not apply forces to the heat insulation plate, thereby preventing the structure of the heat insulation plate from being crushed and ensuring the good heat insulation effect of the heat insulation plate. Furthermore, it can prevent the heat generated by the runaway battery cells from spreading to adjacent normal battery cells, thereby improving the safety of the battery pack to a certain extent.

[0010] In some embodiments, the first plate and the second plate are mutually exclusive.

[0011] In some embodiments, the first plate includes a first magnetic element, the second plate includes a second magnetic element, the first magnetic element and the second magnetic element have the same magnetic poles facing each other, and at least one of the first magnetic element and the second magnetic element is an electromagnet, and the other is an electromagnet or a permanent magnet.

[0012] In some embodiments, the electromagnet is adapted to be electrically connected to an external power source; and / or, the electromagnet is electrically connected to the battery cell.

[0013] In some embodiments, the first plate further includes a first support plate, the first magnetic element is disposed on the side of the first support plate facing the second plate, and the second plate further includes a second support plate, the second magnetic element is disposed on the side of the second support plate facing the first plate.

[0014] In some embodiments, the first support plate has a first receiving recess on the side facing the second plate, and the first magnetic element is disposed in the first receiving recess; and / or, the second support plate has a second receiving recess on the side facing the first plate, and the second magnetic element is disposed in the second receiving recess.

[0015] In some embodiments, the first plate includes a plurality of first magnetic elements arranged along the second direction; and / or, the second plate includes a plurality of second magnetic elements arranged along the second direction, the second direction intersecting the first direction.

[0016] In some embodiments, a plurality of the first magnetic components are electrically connected to an external power source and / or a battery cell via a first wiring portion; and / or, a plurality of the second magnetic components are electrically connected to an external power source and / or a battery cell via a second wiring portion.

[0017] In some embodiments, the thickness of the first support plate is 0.5 mm to 5 mm; and / or, the thickness of the second support plate is 0.5 mm to 5 mm.

[0018] In some embodiments, the thickness of the first magnetic element is 0.2 mm to 5 mm; and / or, the thickness of the second magnetic element is 0.2 mm to 5 mm.

[0019] In some embodiments, the heat insulation board is bonded and fixed to the first plate or the second plate.

[0020] In some embodiments, the thickness of the heat insulation board is 0.5 mm to 5 mm.

[0021] In some embodiments, the battery cell includes a positive electrode, a solid electrolyte, and a negative electrode stacked together.

[0022] In some embodiments, the first plate and the second plate are respectively fixed to two battery cells that are adjacent to each other in the first direction.

[0023] In some embodiments, the battery pack further includes a pressure sensor disposed between the thermal insulation component and the individual battery cells.

[0024] In some embodiments, the pressure sensor is fixed to the side of the first plate facing the battery cell; and / or, the pressure sensor is fixed to the side of the second plate facing the battery cell.

[0025] In some embodiments, the pressure sensor includes a plurality of strain gauges arranged along a second direction.

[0026] In some embodiments, a plurality of the strain gauges are electrically connected to the controller of the battery pack via a third wiring section.

[0027] According to an embodiment of the present invention, the heat insulation component is disposed between two adjacent battery cells. The heat insulation component includes: a first plate and a second plate, the first plate and the second plate being mutually repulsive; and a heat insulation plate disposed between the first plate and the second plate, the heat insulation plate being fixed to the first plate or the second plate.

[0028] According to the embodiment of the present invention, the heat insulation component is configured such that the first plate and the second plate repel each other. The first plate and the second plate can apply a certain repulsive force to the battery cells that are in contact with each other, ensuring the normal working performance of the battery cells and the heat insulation effect of the heat insulation plate, thereby greatly improving the safety of the battery pack.

[0029] In some embodiments, the first plate includes a first magnetic element, the second plate includes a second magnetic element, the first magnetic element and the second magnetic element have the same magnetic poles facing each other, and at least one of the first magnetic element and the second magnetic element is an electromagnet, and the other is an electromagnet or a permanent magnet.

[0030] In some embodiments, the first plate further includes a first support plate, the first magnetic element is disposed on the side of the first support plate facing the second plate, and the second plate further includes a second support plate, the second magnetic element is disposed on the side of the second support plate facing the first plate.

[0031] In some embodiments, the first support plate has a first receiving recess on the side facing the second plate, and the first magnetic element is disposed in the first receiving recess; and / or, the second support plate has a second receiving recess on the side facing the first plate, and the second magnetic element is disposed in the second receiving recess.

[0032] The electrical device according to the embodiments of the present invention includes the aforementioned battery pack or the aforementioned heat insulation component.

[0033] The electrical device according to the embodiments of the present invention can ensure the working performance and safety of the electrical device by adopting the aforementioned battery pack or the aforementioned heat insulation component.

[0034] Additional aspects and advantages of this invention will become apparent from the description which follows, or may be learned by practice of this invention. Attached Figure Description

[0035] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0036] Figure 1 This is an exploded view of a battery pack according to some embodiments of the present invention;

[0037] Figure 2 Exploded views of battery cells and heat insulation components according to some embodiments of the present invention;

[0038] Figure 3 This is a schematic diagram of the first plate facing the heat insulation plate side in some embodiments of the present invention;

[0039] Figure 4 This is a schematic diagram of the side of the first plate away from the heat insulation plate in some embodiments of this utility model.

[0040] Figure label:

[0041] 1000, battery pack;

[0042] 100. Shell;

[0043] 110. Receiving cavity;

[0044] 120. Limiting plate; 121. First plate section; 122. Second plate section;

[0045] 200. Battery cell;

[0046] 300. Thermal insulation components;

[0047] 310. First plate; 311. First magnetic component; 312. First support plate;

[0048] 320. Second plate;

[0049] 330. Insulation board;

[0050] 400. Pressure sensor; 410. Strain gauge;

[0051] 500, First wiring section; 600, Third wiring section. Detailed Implementation

[0052] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0053] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0054] Currently, solid-state batteries require a pre-tightening force of up to 5 MPa or more. Conventional aerogel and other thermal insulation materials are prone to a significant decrease in thermal insulation capacity due to compression, and ordinary lightweight foamed thermal insulation materials are easily crushed.

[0055] The battery pack 1000 of this utility model is described below with reference to the accompanying drawings.

[0056] Combination Figure 1 and Figure 2 As shown, the battery pack 1000 according to an embodiment of the present utility model includes: a housing 100, a plurality of battery cells 200 and a heat insulation component 300.

[0057] The housing 100 defines a receiving cavity 110. The receiving cavity 110 provides space for the integration of multiple battery cells 200, greatly reducing the difficulty of assembling multiple battery cells 200 into a battery pack 1000.

[0058] It should be noted that the aforementioned housing 100 refers to the tray. The tray is made of materials such as aluminum alloy or steel. Both aluminum alloy and steel have a certain strength, which allows the tray to provide a stable support structure for the battery cell 200. This ensures that the battery cell 200 remains in a fixed position during the use of the battery pack 1000. To a certain extent, this can prevent the battery cell 200 from shifting or colliding under the action of external forces such as vibration and impact, thereby protecting the battery cell 200 from mechanical damage and ensuring the working performance of the battery cell 200.

[0059] like Figure 1 As shown, multiple battery cells 200 are arranged along a first direction within the receiving cavity 110. It should be noted that the first direction here can be understood as... Figure 1 As shown in the X direction, by arranging multiple battery cells 200 closely in the receiving cavity 110 along the X direction, the space of the receiving cavity 110 can be fully utilized, so that the battery pack 1000 can accommodate more battery cells 200 in a limited space, thereby improving the energy density of the battery pack 1000 to a certain extent.

[0060] It should be noted that the battery cell 200 and the housing 100 can be fixedly connected by means of adhesive, bolt connection or snap connection, so as to firmly fix the battery cell 200 in the receiving cavity 110 defined by the housing 100, thereby ensuring the integrity and stability of the battery pack 1000. Specifically, this application does not limit the fixed connection method between the battery cell 200 and the housing 100.

[0061] In a specific example, multiple battery cells 200 arranged along X within the receiving cavity 110 form multiple battery modules. By uniformly applying adhesive to the outer surface of the battery module and the inner surface of the tray, the adhesive forms a thin and continuous adhesive layer. When the battery module is installed in the tray, a certain pressure is applied to the battery module and the tray so that the adhesive can fully fill the gap between the battery module and the tray and ensure that the battery module and the tray are tightly attached, so that the battery module and the tray form a firmly connected structure.

[0062] A heat insulation assembly 300 is provided between at least two adjacent battery cells 200. The heat insulation assembly 300 includes a first plate 310, a second plate 320, and a heat insulation plate 330. The first plate 310 and the second plate 320 apply forces toward the adjacent battery cells 200, moving them away from each other. The heat insulation plate 330 is located between the first plate 310 and the second plate 320. The heat insulation assembly 300 can apply a certain pressure to the battery cells 200 to ensure the working performance of the battery cells 200.

[0063] In addition, the first plate 310 and the second plate 320 can protect the battery cell 200 by separating the heat insulation plate 330 and the battery cell 200, thereby ensuring the heat insulation effect of the heat insulation plate 330.

[0064] Specifically, when the battery cell 200 expands and may compress the heat insulation component 300, the first plate 310 and the second plate 320 exert forces toward the adjacent battery cells 200 away from each other, which can resist the force of the battery cell 200 on the heat insulation component 300, thereby reducing the force of the battery cell 200 on the heat insulation plate 330. Therefore, the heat insulation plate 330 can be protected and its structure can be prevented from being crushed, thus ensuring the heat insulation effect of the heat insulation plate 330.

[0065] Meanwhile, by applying forces away from each other to the first plate 310 and the second plate 320 toward the adjacent battery cells 200, these forces can press the corresponding battery cells 200 together. In embodiments where the battery cells 200 are solid-state batteries, since the electrodes and solid electrolytes in the battery cells 200 have a "solid-solid" contact, applying forces to adjacent battery cells 200 can deform the solid components, making the contacts between the interfaces inside the battery cells 200, such as the electrode-electrolyte interface, tighter. This can reduce poor contact and porosity between the electrode-electrolyte interface to a certain extent, thereby improving the ion and electron transport efficiency, reducing the resistance between the electrode-electrolyte interface, and thus improving the overall performance of the battery pack 1000.

[0066] Furthermore, by placing the heat insulation plate 330 between the first plate 310 and the second plate 320, since the first plate 310 and the second plate 320 exert forces toward the adjacent battery cells 200 respectively, they can resist the force exerted by the battery cells 200 on the heat insulation component 300, thereby reducing the force exerted by the battery cells 200 on the heat insulation plate 330. Therefore, the heat insulation plate 330 can be protected, and the structure of the heat insulation plate 330 can be prevented from being crushed. This ensures the good heat insulation effect of the heat insulation plate 330. By using the heat insulation plate 330 to separate the heat transfer between two adjacent battery cells 200, the heat generated by the thermal runaway battery cell 200 can be prevented from spreading to the adjacent normal battery cells 200, thereby improving the safety of the battery pack 1000 to a certain extent.

[0067] As can be seen from the above structure, the battery pack 1000 of this utility model can form a pre-tightening force on the battery cells 200 by applying forces away from each other to the first plate 310 and the second plate 320 respectively toward the adjacent battery cells 200, making the contact between the electrodes and the electrolyte interface of the battery cells 200 tighter and improving the transport efficiency of ions and electrons. At the same time, by placing the heat insulation plate 330 between the first plate 310 and the second plate 320, since the first plate 310 and the second plate 320 respectively apply forces away from each other to the adjacent battery cells 200, they can resist the force of the battery cells 200 on the heat insulation component 300, thereby reducing the force of the battery cells 200 on the heat insulation plate 330. Therefore, the heat insulation plate 330 can be protected, and the structure of the heat insulation plate 330 can be prevented from being crushed, thus ensuring the heat insulation effect of the heat insulation plate 330 and ensuring the safety of the battery pack 1000.

[0068] Currently, in order to ensure efficient ion and electron transport between the electrode and the solid electrolyte interface, existing technologies require applying a certain pressure to the battery cells. The existing heat insulation plate structure is easily damaged by applying pressure to the outside of the battery cells, resulting in poor heat insulation performance. If a battery cell experiences thermal runaway, the heat generated by the thermal runaway battery cell can easily spread to adjacent normal battery cells due to the failure of the heat insulation plate. This chain reaction can cause thermal runaway to spread rapidly in the battery pack, leading to the failure of the entire battery pack, or even causing safety accidents such as fires or explosions.

[0069] Understandably, compared to the prior art, this application, by setting up a heat insulation component 300, applies a force away from each other to the first plate 310 and the second plate 320 respectively toward the adjacent battery cells 200. Without the need for external pressure to be applied to the battery cells 200, the first plate 310 and the second plate 320 can press the adjacent battery cells 200 together, making the contact between the electrode and the electrolyte interface closer, thereby achieving effective ion and electron transport and facilitating a reduction in the number of components in the battery pack 1000.

[0070] Meanwhile, the first plate 310 and the second plate 320, since they respectively exert forces toward the adjacent battery cells 200 away from each other, can resist the force of the battery cells 200 on the heat insulation component 300, thereby reducing the force of the battery cells 200 on the heat insulation plate 330. Therefore, they can protect the heat insulation plate 330, prevent the structure of the heat insulation plate 330 from being crushed, and thus ensure the heat insulation effect of the heat insulation plate 330, thereby ensuring the safety of the battery pack 1000.

[0071] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0072] In some embodiments, the first plate 310, the second plate 320, and the heat insulation plate 330 can all be sheet-like or membrane-like structures.

[0073] In some embodiments, the first plate 310 and the second plate 320 are respectively positioned and engaged with adjacent battery cells 200. Specifically, this can be understood as fixing the first plate 310 to one of the battery cells 200 and the second plate 320 to another battery cell 200, so that the first plate 310 and one of the battery cells 200, and the second plate 320 and the other battery cell 200, remain relatively stationary; or, the first plate 310, the second plate 320, and the corresponding battery cells 200 are all fixed to the housing 100, so that the first plate 310 and one of the battery cells 200, and the second plate 320 and the other battery cell 200, remain stationary with respect to the housing 100.

[0074] In some embodiments, the first plate 310 and the second plate 320 repel each other. Because the first plate 310 and the second plate 320 repel each other, that is, because there is a repulsive force between the first plate 310 and the second plate 320, the first plate 310 can exert a force on one of the adjacent battery cells 200. Figure 2 The second plate 320 exerts a repulsive force upwards in the X direction on the other battery cell 200. Figure 2The downward repulsive force in the X direction causes adjacent battery cells 200 to have a force that pulls them away from each other.

[0075] In some examples, the insulation panel 330 is fixed to either the first plate 310 or the second plate 320, meaning that the insulation panel 330 is fixed to the first plate 310 or the second plate 320. Both installation methods of the insulation panel 330 result in the insulation panel 330 being located between the first plate 310 and the second plate 320.

[0076] In some specific embodiments, the repulsive force between the first plate 310 and the second plate 320 is the repulsive force generated by the mutual repulsion between magnets.

[0077] In some other embodiments, the force exerted by the first plate 310 and the second plate 320 on the corresponding battery cell 200 is the force generated when the liquid is squeezed.

[0078] For example, a receiving space is defined between the first plate 310 and the second plate 320. The first plate 310 and the second plate 320 can be regarded as piston components. The heat insulation plate 330 is located in the receiving space, and the receiving space is filled with liquid. When two adjacent battery cells 200 are working and slightly expand, the battery cells 200 exert a certain compressive force on the corresponding first plate 310 and second plate 320. After being compressed by the outside, the liquid in the receiving space exerts a reaction force on the first plate 310 and the second plate 320, thereby causing the first plate 310 and the second plate 320 to exert a force away from each other towards the adjacent battery cells 200. This reduces the possibility that the first plate 310 and the second plate 320 will compress the heat insulation plate 330, thus protecting the heat insulation plate 330.

[0079] In some examples, the insulation plate 330 is provided with through holes, through which liquid in the containment space can flow to reduce the force exerted by the liquid on the insulation plate 330.

[0080] In some embodiments, combined with Figure 2 , Figure 3 and Figure 4As shown, the first plate 310 includes a first magnetic element 311, and the second plate 320 includes a second magnetic element (not shown). The first magnetic element 311 and the second magnetic element have the same magnetic poles facing each other. At least one of the first magnetic element 311 and the second magnetic element is an electromagnet, and the other is an electromagnet or a permanent magnet. Due to the principle of repulsion between like magnetic poles in physics, when the first magnetic element 311 and the second magnetic element have the same magnetic poles facing each other, a force is generated that causes the first magnetic element 311 and the second magnetic element to move away from each other, thus causing them to repel each other. This allows the first plate 310 and the second plate 320 to exert a repulsive force towards the adjacent battery cell 200, moving them away from each other.

[0081] It is worth noting that at least one of the first magnetic element 311 and the second magnetic element is an electromagnet, and the other is an electromagnet or a permanent magnet. This can be understood as the first magnetic element 311 being an electromagnet and the second magnetic element being a permanent magnet, or the first magnetic element 311 being a permanent magnet and the second magnetic element being an electromagnet, or both the first magnetic element 311 and the second magnetic element being electromagnets. As long as the magnetic poles of the first magnetic element 311 and the second magnetic element are facing each other, this application does not impose too many restrictions on the specific type of magnet used.

[0082] In a specific example, both the first magnetic element 311 and the second magnetic element are electromagnets. By energizing the first magnetic element 311 and the second magnetic element in the same direction, the magnetic poles of the first magnetic element 311 and the second magnetic element are aligned with each other, thereby generating a repulsive force.

[0083] In some embodiments, the first magnetic element 311 and the second magnetic element between two adjacent battery cells 200 have a repulsive force, which can ensure the force balance between the first plate 310 and the second plate 320, realize the spatial isolation of the heat insulation plate 330, and prevent additional compression of the heat insulation plate 330, thus causing a decrease in the heat insulation performance of the heat insulation plate 330.

[0084] In some embodiments, the electromagnet is adapted to be electrically connected to an external power source. The external power source provides direct current to the electromagnet, and utilizing the physical principle of "electromagnetism," the electromagnet generates a magnetic field when energized, thereby producing magnetic force.

[0085] In some embodiments, the electromagnet is electrically connected to the battery cell 200. This ensures that the electromagnet retains its magnetic force even after the vehicle is turned off, creating a repulsive force between the first plate 310 and the second plate 320. This, in turn, generates pressure on the corresponding battery cell 200, ensuring close contact between the electrodes and the electrolyte interface within the battery cell 200.

[0086] It should be noted that the electromagnet is mainly powered by an external power source to generate magnetic force, so that there is still a repulsive force between the first plate 310 and the second plate 320. The electromagnet is electrically connected to the battery cell 200 as a backup power source for the electromagnet, so that the electromagnet can still exert a certain pressure on the battery cell 200 after the vehicle is turned off. This avoids the situation where when the vehicle is turned off, the external power source cannot provide DC power to the electromagnet, causing the first magnetic element 311 and the second magnetic element to exert a smaller or even disappearing repulsive force towards the adjacent battery cells 200, causing the adjacent battery cells 200 to disperse, which is not conducive to the electrical connection safety of the battery cells 200.

[0087] In some embodiments, combined with Figure 2 , Figure 3 and Figure 4 As shown, the first plate 310 further includes a first support plate 312, and a first magnetic element 311 is disposed on the side of the first support plate 312 facing the second plate 320. The second plate 320 further includes a second support plate (not shown in the figure), and a second magnetic element is disposed on the side of the second support plate facing the first plate 310. The first support plate 312 can provide stable support for the first magnetic element 311, and the second support plate can provide stable support for the second magnetic element, preventing the first magnetic element 311 and the second magnetic element from shaking or displacing under external impact, thereby ensuring the working stability of the first magnetic element 311 and the second magnetic element.

[0088] In a specific example, the first direction is the width direction of the battery cell 200. The first support plate 312 and the second support plate are located on one side of the width direction of the battery cell 200. The outer contour dimensions of the first support plate 312 and the second support plate are the same as the dimensions of one side of the battery cell 200 in the width direction. When the first magnetic component 311 and the second magnetic component generate repulsive force, the first support plate 312 and the second support plate can respectively transmit the force evenly to the corresponding battery cell 200, avoid stress concentration in the battery cell 200, and extend the service life of the battery cell 200 to a certain extent.

[0089] Furthermore, the battery cell 200 and the first support plate 312 extend along the length direction of the battery cell 200 on the sides opposite to each other in the first direction.

[0090] It should be noted that the first support plate 312 and the second support plate can be fixed on the corresponding battery cell 200 respectively, or the first support plate 312 and the second support plate can be disposed on the housing 100.

[0091] In a specific example, both the first support plate 312 and the second support plate can be made of one or more composite materials such as high-strength steel, high-strength aluminum-magnesium alloy, or fiber-reinforced composite materials, so as to provide sufficient support strength for the first magnetic component 311 and the second magnetic component.

[0092] In some embodiments, the first support plate 312 has a first receiving recess (not shown) on the side facing the second plate 320, and a first magnetic element 311 is disposed in the first receiving recess. The first receiving recess can be used to precisely position and fix the first magnetic element 311.

[0093] In addition, the first receiving recess can reserve space for the position of the first magnetic element 311 on the first support plate 312. In this way, when the first magnetic element 311 is installed on the first support plate 312, the first magnetic element 311 can be prevented from protruding from the surface of the first support plate 312 facing the second plate 320, which facilitates the subsequent fixing of the heat insulation plate 330 on the first support plate 312.

[0094] In a specific example, the inner wall of the first receiving recess can fit tightly with the outer peripheral wall of the first magnetic component 311 facing the first receiving recess, which can ensure that the first magnetic component 311 and the first support plate 312 are in a relatively accurate position, greatly preventing the first magnetic component 311 from shifting during use, thereby ensuring the normal operation of the first magnetic component 311.

[0095] In some embodiments, the second support plate has a second receiving recess (not shown) on the side facing the first plate 310, and the second magnetic element is disposed in the second receiving recess. The second receiving recess can be used to precisely position and fix the second magnetic element.

[0096] In addition, the second receiving recess can reserve space for the position of the second magnetic component on the second support plate. This prevents the second magnetic component from protruding from the surface of the second support plate facing the first plate 310 when the second magnetic component is installed on the second support plate, thereby facilitating the subsequent fixing of the heat insulation plate 330 to the second support plate.

[0097] In a specific example, the inner wall of the second receiving recess can fit tightly with the outer peripheral wall of the second magnetic component facing the second receiving recess, which can ensure that the second magnetic component and the second support plate are in a relatively accurate position, greatly preventing the second magnetic component from shifting during use, thereby ensuring the normal operation of the second magnetic component.

[0098] In summary, by providing the first and second receiving recesses, the first magnetic component 311 and the second magnetic component can be firmly connected to the first support plate 312 and the second support plate, respectively. The first magnetic component 311 and the second magnetic component are arranged opposite to each other, and a relatively stable repulsive force can be generated between the first magnetic component 311 and the second magnetic component after the electromagnet is energized.

[0099] In some embodiments, combined with Figure 2 and Figure 3 As shown, the first plate 310 includes a plurality of first magnetic elements 311, which are arranged along a second direction. It should be noted that the second direction here can be understood as... Figure 3 The Y direction shown is the length direction of the first plate 310. By arranging multiple first magnetic elements 311 in the Y direction and spacing them at intervals, the multiple electromagnets after being energized can generate a relatively uniform magnetic field within the limited space of the heat insulation component 300.

[0100] In some embodiments, the second plate 320 includes a plurality of second magnetic elements (not shown in the figure), which are arranged along a second direction that intersects with the first direction. It should be noted that the arrangement of the plurality of second magnetic elements along the second direction is the same as and corresponds to the arrangement of the plurality of first magnetic elements 311 along the second direction. By arranging the plurality of second magnetic elements in the Y direction at intervals, the multiple electromagnets, when energized, can generate a relatively uniform magnetic field within the limited space of the heat insulation component 300.

[0101] In summary, by setting multiple first magnetic elements 311 and multiple second magnetic elements, and setting the multiple first magnetic elements 311 and multiple second magnetic elements relative to each other, a uniform repulsive force is generated between the multiple first magnetic elements 311 and multiple second magnetic elements. The repulsive force is uniformly transmitted to the corresponding battery cell 200 through the first support plate 312 and the second support plate.

[0102] In some other embodiments, the first direction can be understood as Figure 1 The X direction shown is the width direction of the first support plate 312 and the second support plate. The first magnetic element 311 and the second magnetic element are respectively located on one side of the width direction of the first support plate 312 and the second support plate. The outer contour dimension of the first magnetic element 311 is the same as the dimension of one side of the first support plate 312 in the width direction, and the outer contour dimension of the second magnetic element is the same as the dimension of one side of the second support plate in the width direction.

[0103] In some embodiments, a plurality of first magnetic elements 311 are electrically connected to an external power source and / or a battery cell 200 via a first wiring portion 500. The external power source and / or the battery cell 200 can provide current to the plurality of first magnetic elements 311 so that the plurality of first magnetic elements 311 can operate normally.

[0104] It should be noted that the multiple first magnetic components 311 being electrically connected to the external power supply and / or battery cell 200 through the first wiring portion 500 can be understood as the multiple first magnetic components 311 being electrically connected to the external power supply through the first wiring portion 500, or the multiple first magnetic components 311 being electrically connected to the battery cell 200 through the first wiring portion 500.

[0105] In some embodiments, the first wiring section 500 includes a first main line and a plurality of first branch lines. One end of the first main line is connected to the plurality of first branch lines, and the other end is connected to the battery cell 200 and / or an external power source. The plurality of first branch lines are respectively connected to a plurality of first magnetic components 311. The current from the battery cell 200 and / or the external power source flows into the plurality of first magnetic components 311 through the first main line and the plurality of first branch lines, respectively, to ensure the normal operation of the first magnetic components 311.

[0106] In some embodiments, the first wiring portion 500 is embedded in the first support plate 312 through the first receiving groove. The first magnetic element 311 is embedded in the first support plate 312 through the first receiving recess to ensure the flatness of the first support plate 312 facing the second plate 320, to prevent the first wiring portion 500 and the first magnetic element 311 from protruding from the first support plate 312, and to prevent the first wiring portion 500 and the first magnetic element 311 from occupying too much internal space of the heat insulation assembly 300, thereby improving the utilization rate of the internal space of the heat insulation assembly 300.

[0107] Furthermore, the first receiving groove can also limit the position of the first wiring portion 500 to a certain extent, thereby ensuring the positional stability of the first wiring portion 500. In a specific example, when both the first magnetic element 311 and the second magnetic element are electromagnets, the electromagnets are connected to the external power supply through the first wiring portion 500. The first wiring portion 500 can be embedded in the first support plate 312 and the second support plate through the first receiving recess and the second receiving recess respectively, and lead out from the same side.

[0108] In some embodiments, a plurality of the second magnetic elements are electrically connected to an external power source and / or battery cell 200 via a second wiring portion. The external power source and / or battery cell 200 is capable of providing current to the plurality of second magnetic elements to enable the plurality of second magnetic elements to operate normally.

[0109] It should be noted that the multiple second magnetic components being electrically connected to the external power source and / or battery cell 200 through the second wiring portion can be understood as the multiple second magnetic components being electrically connected to the external power source through the second wiring portion, or the multiple second magnetic components being electrically connected to the battery cell 200 through the second wiring portion.

[0110] In some embodiments, the second wiring section includes a second main line and a plurality of second branch lines. One end of the second main line is connected to the plurality of second branch lines, and the other end is connected to the battery cell 200 and / or an external power source. The plurality of second branch lines are respectively connected to a plurality of second magnetic components. The current from the battery cell 200 and / or the external power source flows into the plurality of second magnetic components through the second main line and the second branch lines to ensure the normal operation of the second magnetic components.

[0111] In some embodiments, the second wiring portion is embedded in the second support plate via a second receiving groove. The second magnetic component is embedded in the second support plate via a second receiving recess to ensure the flatness of the second support plate facing the first plate 310, prevent the second wiring portion and the second magnetic component from protruding from the second support plate, and prevent the second wiring portion and the second magnetic component from occupying too much internal space of the heat insulation assembly 300, thereby improving the utilization rate of the internal space of the heat insulation assembly 300.

[0112] In addition, the second receiving groove can also limit the position of the second wiring section to a certain extent, thereby ensuring the positional stability of the second wiring section.

[0113] In a specific example, when the second magnetic component is an electromagnet and the first magnetic component 311 is a permanent magnet, the second magnetic component is connected to the external power supply through the second wiring portion. The second wiring portion can be embedded in the second support plate through the second receiving groove and led out from the same side.

[0114] In some embodiments, the thickness of the first support plate 312 is 0.5mm to 5mm. When the thickness of the first support plate 312 is too thin, the support strength of the first support plate 312 is low, and the first support plate 312 may deform when the first magnetic element 311 applies a force to the first support plate 312, resulting in the first support plate 312 being unable to transmit a uniform repulsive force to the battery cell 200; when the thickness of the first support plate 312 is too thick, the first support plate 312 occupies a large amount of internal space in the battery pack 1000, affecting the energy density of the battery pack 1000.

[0115] In summary, when the thickness of the first support plate 312 is 0.5mm to 5mm, it can not only ensure that the first support plate 312 has a certain supporting strength and avoid deformation of the first support plate 312, and effectively transmit the force applied by the first magnetic component 311 to the first support plate 312 to the battery cell 200, but also improve the internal space utilization of the battery pack 1000 to a certain extent, thereby ensuring the energy density of the battery pack 1000.

[0116] Specifically, the thickness of the first support plate 312 is 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm or 5mm, etc.

[0117] In some embodiments, the thickness of the second support plate is 0.5 mm to 5 mm. When the thickness of the second support plate is too thin, the support strength of the second support plate is low, and the second support plate may deform when the second magnetic component applies force to the second support plate, resulting in the second support plate being unable to transmit a uniform repulsive force to the battery cell 200; when the thickness of the second support plate is too thick, it occupies a large amount of internal space in the battery pack 1000, affecting the energy density of the battery pack 1000.

[0118] In summary, when the thickness of the second support plate is 0.5mm to 5mm, it can not only ensure that the second support plate has a certain support strength and avoid deformation, but also effectively transmit the force exerted by the second magnetic component on the second support plate to the battery cell 200. It can also improve the internal space utilization of the battery pack 1000 to a certain extent, thereby ensuring the energy density of the battery pack 1000.

[0119] Specifically, the thickness of the second support plate is 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm or 5mm, etc.

[0120] In some embodiments, the thickness of the first magnetic element 311 is 0.2 mm to 5 mm. When the thickness of the first magnetic element 311 is too thin, the magnetic force generated by the first magnetic element 311 cannot meet the pressure required by the battery cell 200, resulting in low electrical energy generated by the battery cell 200, which in turn affects the low working efficiency of the battery pack 1000; when the thickness of the first magnetic element 311 is too thick, the first magnetic element 311 cannot be placed on the first support plate 312, and the first magnetic element 311 may also occupy a large space inside the battery pack 1000, affecting the energy density of the battery pack 1000.

[0121] In summary, when the thickness of the first magnetic component 311 is 0.2mm to 5mm, the repulsive force generated between the first magnetic component 311 and the second magnetic component can meet the pressure required by the battery cell 200, ensuring that the battery cell 200 generates sufficient electrical energy and ensuring the low working efficiency of the battery pack 1000. The first magnetic component 311 can be set in the first receiving recess in the first support plate 312, so that the first magnetic component 311 will not occupy too much space in the battery pack 1000, thereby ensuring the energy density of the battery pack 1000.

[0122] Specifically, the thickness of the first magnetic component 311 is 0.2mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm or 5mm, etc.

[0123] In some embodiments, the thickness of the second magnetic element is 0.2 mm to 5 mm. When the thickness of the second magnetic element is too thin, the repulsive force generated by the second magnetic element cannot meet the pressure required by the battery cell 200, resulting in low electrical energy generated by the battery cell 200, which in turn affects the low working efficiency of the battery pack 1000; when the thickness of the second magnetic element is too thick, the first magnetic element 311 cannot be placed on the second support plate, and the second magnetic element may also occupy a large amount of internal space of the battery pack 1000, affecting the energy density of the battery pack 1000.

[0124] In summary, when the thickness of the second magnetic component is 0.2mm to 5mm, the repulsive force generated between the second magnetic component and the second magnetic component can meet the pressure required by the battery cell 200, ensuring that the battery cell 200 generates sufficient electrical energy and ensuring the working efficiency of the battery pack 1000. The second magnetic component can be set in the second receiving recess in the second support plate, so that the second magnetic component will not occupy too much internal space of the battery pack 1000, thereby ensuring the energy density of the battery pack 1000.

[0125] Specifically, the thickness of the second magnetic component is 0.2mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm or 5mm, etc.

[0126] In some embodiments, the heat insulation plate 330 is bonded and fixed to the first plate 310 or the second plate 320. This means that the heat insulation plate 330 is bonded and fixed to the side of the first plate 310 away from the battery cell 200, or the heat insulation plate 330 is bonded and fixed to the second plate 320 away from the battery cell 200.

[0127] It should be noted that regardless of whether the heat insulation plate 330 is bonded and fixed to the side of the first plate 310 away from the battery cell 200 or bonded and fixed to the second plate 320 away from the battery cell 200, the heat insulation plate 330 is always located between the first plate 310 and the second plate 320. Since the first plate 310 and the second plate 320 exert forces toward the adjacent battery cells 200 respectively, they can resist the force of the battery cells 200 on the heat insulation component 300, thereby reducing the force of the battery cells 200 on the heat insulation plate 330. Therefore, the heat insulation plate 330 can be protected, and the structure of the heat insulation plate 330 can be prevented from being crushed, thus ensuring the heat insulation effect of the heat insulation plate 330.

[0128] In some embodiments, the heat insulation plate 330 can be fixed to the side of the first plate 310 away from the battery cell 200 or the side of the second plate 320 away from the battery cell 200 by double-sided tape or glue.

[0129] In a specific example, the first direction is the width direction of the battery cell 200. The heat insulation plate 330 is located on one side of the width direction of the battery cell 200. The outer contour dimensions of the heat insulation plate 330 are the same as the dimensions of one side of the battery cell 200 in the width direction. To a certain extent, this ensures that the heat insulation plate 330 can completely block the heat from the runaway battery cell 200 to the adjacent normal battery cell 200, thereby ensuring the safety of the adjacent normal battery cell 200.

[0130] In some embodiments, the heat insulation board 330 may be made of conventional high-temperature heat insulation materials, including one or more of aerogel, nano-calcium silicate board or nano-calcium dioxide board.

[0131] In other embodiments, the heat insulation plate 330 may also be made of a combination of heat insulation material and heat absorption material, wherein the heat absorption material includes one or more of the following organic and inorganic phase change materials: hydrogel, paraffin wax, aluminum sulfate octadecahydrate, sodium pyrophosphate free decahydrate, potassium aluminum sulfate dodecahydrate, ammonium aluminum sulfate dodecahydrate, oxalic acid or magnesium chloride hexahydrate.

[0132] In summary, the heat insulation panel 330 can be made of conventional high-temperature heat insulation materials or a combination of heat insulation materials and heat-absorbing materials.

[0133] It is worth noting that this application does not use the hollow self-supporting layer or reinforcing column structure in the prior art. Instead, the heat insulation board 330 is bonded and fixed to the first plate 310 or the second plate 320. To a certain extent, this can avoid the thermal bridge effect of the hollow self-supporting layer or reinforcing column structure from affecting the heat insulation efficiency of the heat insulation material, thereby ensuring the heat insulation performance and heat insulation efficiency of the heat insulation board 330 to a certain extent.

[0134] In some embodiments, the thickness of the heat insulation plate 330 is 0.5mm to 5mm. When the thickness of the heat insulation plate 330 is too thin, the heat insulation effect of the heat insulation plate 330 is poor; when the thickness of the heat insulation plate 330 is too thick, it may occupy the internal space of the battery pack 1000 and affect the energy density of the battery pack 1000.

[0135] In summary, when the thickness of the heat insulation plate 330 is 0.5mm to 5mm, it can ensure the heat insulation effect of the heat insulation plate 330 and avoid occupying the internal space of the battery pack 1000, thereby ensuring the energy density of the battery pack 1000.

[0136] Specifically, the thickness of the heat insulation board 330 is 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm or 5mm, etc.

[0137] In some embodiments, the battery cell 200 includes a positive electrode, a solid electrolyte, and a negative electrode stacked together. It should be noted that the battery cell 200 here can be understood as a solid-state battery. When at least one of the first magnetic element 311 and the second magnetic element is electrically connected to an external power source, there is a repulsive force between the first magnetic element 311 and the second magnetic element. The first magnetic element 311 and the second magnetic element are respectively disposed on the first plate 310 and the second plate 320. The first plate 310 and the second plate 320 exert a pressure on adjacent solid-state batteries, causing them to move away from each other. This pressure can compress the corresponding solid-state batteries, resulting in a "solid-solid" contact between the electrodes and the solid electrolyte in the solid-state battery.

[0138] Furthermore, by applying pressure to adjacent solid-state batteries, the solid components can be deformed, making the contact between various interfaces inside the solid-state battery, such as the electrode-electrolyte interface, tighter. This can reduce poor contact and porosity between the electrode-electrolyte interface to a certain extent, thereby improving the transport efficiency of ions and electrons, reducing the resistance between the electrode-electrolyte interface, and thus improving the overall performance of the battery pack 1000.

[0139] In some embodiments, such as Figure 1 As shown, the housing 100 has two limiting plates 120 arranged along a first direction. The battery cells 200 at both ends of the battery module in the first direction abut against the corresponding first plate portion 121 and second plate portion 122, respectively. This ensures the stability of the structure and the reliability of the performance of the battery module composed of multiple battery cells 200 in the battery pack 1000.

[0140] In a specific example, the first plate portion 121 is located at Figure 1 On the left side in the X direction, the second plate 122 is located Figure 1 On the right side of the X-direction, when the battery pack 1000 is subjected to an impact force, Figure 1 The battery cell 200 on the left side in the X direction experiences a shaking or displacement with an outward force, and the first plate 121 can exert this force. Figure 1 The battery cell 200 on the left side in the X direction has an inward reaction force, which allows the first plate 121 to resist it. Figure 1 The battery cell 200 on the left side in the X direction is confined inside the housing 100, while... Figure 1 The battery cell 200 on the right side in the X direction experiences a shaking or displacement with an outward force, and the second plate 122 can counteract this. Figure 1 The battery cell 200 on the right side in the X direction has an inward reaction force, which allows the second plate 122 to resist it. Figure 1 The battery cell 200 is located on the right side in the X direction and is confined inside the housing 100.

[0141] Furthermore, when the first plate portion 121 and the second plate portion 122 respectively abut against the battery cells 200 on the left and right sides in the X direction, the other battery cells 200 in the battery pack 1000 can also maintain their relative positions with the battery cells 200 on the left and right sides in the X direction.

[0142] Based on this, when the battery cell 200 is a solid-state battery, only one, two, three or more heat insulation components 300 can be set between multiple solid-state batteries arranged along the first direction. Since multiple solid-state batteries are located in the receiving cavity 110 of the housing 100 of the battery pack 1000, the solid-state batteries at both ends of the first direction are stopped by the first plate portion 121 and the second plate portion 122 of the housing 100. When the first plate body 310 and the second plate body 320 of the heat insulation component 300 apply pressure to press the adjacent solid-state batteries, the pressed adjacent solid-state batteries can transfer part of the pressure to other solid-state batteries that are not in direct contact with the heat insulation component 300, so that other solid-state batteries can indirectly achieve being pressed by the first plate body 310 and the second plate body 320 of the heat insulation component 300.

[0143] In some embodiments, the housing 100 defines a first plate portion 121 and a second plate portion 122 on two sidewalls in a first direction. This allows the first plate portion 121 and the second plate portion 122 to engage with battery cells 200 at both ends in the first direction, respectively, thereby fixing the battery cells 200 at both ends in the first direction inside the housing 100.

[0144] In some embodiments, the first plate 310 and the second plate 320 are respectively fixed to two adjacent battery cells 200 in a first direction. The two adjacent battery cells 200 in the first direction can provide stable support for the first plate 310 and the second plate 320 respectively, preventing the first plate 310 and the second plate 320 from shaking or displacing. At the same time, the first plate 310 and the second plate 320 can also exert a certain pressure on the two adjacent battery cells 200 in the first direction respectively.

[0145] In a specific example, the heat insulation plate 330 is fixed to the first plate 310 or the second plate 320, and then the first plate 310 and the second plate 320 are respectively fixed to two adjacent battery cells 200 in the first direction. The first plate 310 and the second plate 320 are arranged facing each other. This allows the first plate 310, the second plate 320 and the heat insulation plate 330 to be arranged correspondingly when multiple battery cells 200 are stacked in the tray. On the one hand, the heat insulation component 300 can apply a certain working pressure to the battery cell 200, and on the other hand, the heat insulation component 300 can also insulate the adjacent battery cells 200 from heat.

[0146] In some embodiments, combined with Figure 2 , Figure 3 and Figure 4 As shown, the battery pack 1000 also includes a pressure sensor 400, which is located between the thermal insulation component 300 and the battery cell 200. The pressure sensor 400 can monitor and detect the signal of the pressure on the battery cell 200 in real time.

[0147] In a specific example, the first magnetic component 311 and the second magnetic component are electrically connected to an external power source. The battery pack 1000 includes a controller. The pressure sensor 400 can transmit the detected pressure signal to the controller. The controller receives the signal, analyzes and processes it to obtain the pressure value. The controller adjusts the current of the external power source according to the preset pressure of the battery cell 200, thereby adjusting the current of the first magnetic component 311 and / or the second magnetic component, and adjusting the repulsive force between the first magnetic component 311 and the second magnetic component. This allows the first plate 310 and the second plate 320 to adjust the pressure on adjacent battery cells 200 respectively, so as to provide a suitable pressure for the battery cells 200 and a comfortable working environment for the heat insulation plate 330, and prevent the heat insulation plate 330 from being squeezed by the repulsive force.

[0148] In some embodiments, the pressure sensor 400 is fixed to the side of the first plate 310 facing the battery cell 200. The first plate 310 can provide stable support for the pressure sensor 400, ensuring the stable operation of the pressure sensor 400.

[0149] In a specific example, the pressure sensor 400 array is disposed on one side of the first plate 310 in close contact with the battery cell 200 to accurately monitor the pressure on the battery cell 200. The pressure sensor 400 can transmit the detected pressure signal to the controller. The controller receives the signal, analyzes and processes it to obtain the pressure value. The controller adjusts the current of the external power supply according to the preset pressure of the battery cell 200, thereby adjusting the current of the first magnetic component 311 and / or the second magnetic component, and adjusting the repulsive force between the first magnetic component 311 and the second magnetic component, so as to realize the adjustment of the pressure of the first plate 310 and the second plate 320 on the adjacent battery cell 200 respectively.

[0150] In some embodiments, the pressure sensor 400 is fixed to the side of the second plate 320 facing the battery cell 200. The second plate 320 can provide stable support for the pressure sensor 400, ensuring the stable operation of the pressure sensor 400.

[0151] In a specific example, the pressure sensor 400 array is disposed on the second plate 320 in close contact with the battery cell 200 to accurately monitor the pressure of the battery cell 200. The pressure sensor 400 can transmit the detected pressure signal to the controller. The controller receives the signal, analyzes and processes it to obtain the pressure value. The controller adjusts the current of the external power supply according to the preset pressure of the battery cell 200, thereby adjusting the current of the first magnetic component 311 and / or the second magnetic component, and adjusting the repulsive force between the first magnetic component 311 and the second magnetic component, so as to realize the adjustment of the pressure of the first plate 310 and the second plate 320 on the adjacent battery cells 200 respectively.

[0152] In summary, the fact that the pressure sensor 400 is fixed on the side of the first plate 310 facing the battery cell 200 and the pressure sensor 400 is fixed on the side of the second plate 320 facing the battery cell 200 both enable the pressure sensor 400 to accurately monitor the pressure of the corresponding battery cell 200 and adjust the pressure of the battery cell 200.

[0153] In some embodiments, the number of pressure sensors 400 is 2 to 4 times the number of battery cells 200, so as to more accurately test the pressure signal received by the battery cell 200 that is in contact with the pressure sensor 400.

[0154] In some embodiments, the preset value of the pressure exerted on the battery cell 200 by the first plate 310 or the second plate 320 is 5MPa to 15MPa. Specifically, a preset pressure needs to be applied to the solid-state battery for higher charging and discharging efficiency during operation. If the pressure received on the battery cell 200 is too low, it will affect the charging and discharging efficiency of the solid-state battery during operation. If the preset value of the pressure exerted on the battery cell 200 by the first plate 310 or the second plate 320 is too high, it exceeds the pressure value required for normal operation of the solid-state battery, increases the energy loss of the solid-state battery itself, and may also damage the tray of the battery pack 1000.

[0155] In summary, when the pressure exerted on the battery cell 200 by the first plate 310 or the second plate 320 is preset to be 5MPa to 15MPa, it can ensure the charging and discharging efficiency of the solid-state battery during operation, avoid the loss of the solid-state battery's own electrical energy, avoid damage to the casing 100 of the battery pack 1000, and to a certain extent ensure the working performance of the battery pack 1000.

[0156] Specifically, the preset pressure values ​​of the first plate 310 or the second plate 320 on the battery cell 200 are 5MPa, 6MPa, 7MPa, 8MPa, 9MPa, 10MPa, 11MPa, 12MPa, 13MPa, 14MPa or 15MPa, etc.

[0157] In a specific example, when stacking battery cells 200, the heat insulation plate 330 is fixed between the first plate 310 or the second plate 320, and then the first plate 310 and the second plate 320 are respectively fixed on two adjacent battery cells 200 in the first direction, with the first plate 310 and the second plate 320 facing each other, and then the battery cells 200 are stacked; after the battery cells 200 are stacked, the electromagnet is connected to an external power source and the current in the electromagnet is adjusted by the controller until the pressure sensor 400 measures that the pressure on the battery cell 200 reaches the preset pressure.

[0158] It is worth noting that when the pressure sensor 400 measures a pressure greater than 15 MPa on the battery cell 200, the current in the electromagnet should be reduced accordingly until the pressure sensor 400 measures a pressure between 5 MPa and 15 MPa on the battery cell 200; when the pressure sensor 400 measures a pressure less than 5 MPa on the battery cell 200, the current in the electromagnet should be increased accordingly until the pressure sensor 400 measures a pressure between 5 MPa and 15 MPa on the battery cell 200.

[0159] It should also be noted that in the prior art, the battery cell 200 and the heat insulation structure are pressed together by applying external force (pre-tightening force), and the battery cell 200 is located in the receiving cavity 110 within the battery pack 1000. However, in actual use, after the battery cell 200 has been charged for a period of time, it will generate gas and expand slightly, which may cause the battery cells 200 to squeeze each other, thereby affecting the normal operation of the heat insulation structure.

[0160] It should also be noted that, in response to the aforementioned existing problems, this application uses an electromagnet to apply a preload to the battery cell 200. The pressure sensor 400 can monitor the pressure on the battery cell 200 in real time and feed the collected pressure back to the controller to adjust the magnitude of the current output by the external power supply to control the magnitude of the magnetic force generated by the electromagnet, thereby controlling the pressure of the first plate 310 and the second plate 320 on the corresponding battery cell 200 within a preset range.

[0161] In a specific example, after the battery cell 200 has been charged for a period of time, the battery cell 200 will expand slightly. The first plate 310 and the second plate 320 will slightly compress the heat insulation plate 330. By reducing the current, the magnetic force generated by the electromagnet is reduced. The pressure of the first plate 310 and the second plate 320 on the adjacent battery cell 200 is reduced accordingly, so as to give the battery cell 200 a comfortable "breathing" environment, that is, to give the battery cell 200 a certain expansion space. However, the expansion of the battery cell 200 will not compress the heat insulation plate 330 and will not affect the normal operation of the heat insulation plate 330.

[0162] In some embodiments, such as Figure 4 As shown, the pressure sensor 400 includes multiple strain gauges 410, which are arranged along a second direction. The multiple strain gauges 410 can improve the detection capability of the pressure sensor 400 to a certain extent.

[0163] In some embodiments, multiple strain gauges 410 are electrically connected to the controller of the battery pack 1000 via a third wiring section 600. As front-end sensors, the strain gauges 410 convert mechanical strain signals into electrical signals and transmit them to the controller via the third wiring section 600, enabling real-time monitoring of the pressure in the battery pack 1000.

[0164] In the description of this utility model, the features defined as "first", "second" and "third" may explicitly or implicitly include one or more of the features, used to distinguish the descriptive features, without any order or importance.

[0165] In some embodiments, the third wiring section 600 includes a third main line and a plurality of third branch lines. One end of the third main line is connected to the plurality of third branch lines, and the other end is connected to the controller. The plurality of third branch lines are respectively connected to a plurality of strain gauges 410.

[0166] Specifically, the strain gauge 410 can transmit the detected current signal to the controller through the first main line and the first branch line to monitor the pressure of the battery pack 1000 in real time.

[0167] In some embodiments, the third wiring portion 600 is embedded in the side of the first support plate 312 facing away from the first plate 310 or in the side of the second support plate facing away from the second plate 320. This allows for the limitation of the position of the third wiring portion 600, thereby preventing the third wiring portion 600 from shaking or displacing to a certain extent, ensuring the positional stability of the third wiring portion 600, and thus ensuring the normal operation of the third wiring portion 600.

[0168] In some embodiments, the pressure sensor 400 may be an array of thin-film sensors attached to the surfaces of the first support plate 312 and the second support plate. Multiple strain gauges 410 are embedded in the side of the first support plate 312 facing away from the first plate 310 or in the side of the second support plate facing away from the second plate 320, and are electrically connected to the third wiring portion 600. The thermal insulation assembly 300 of an embodiment of the present invention is described below with reference to the accompanying drawings.

[0169] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, according to an embodiment of the present utility model, a heat insulation component 300 is provided. The battery pack 1000 includes a plurality of battery cells 200. The heat insulation component 300 is disposed between two adjacent battery cells 200. The heat insulation component 300 includes a first plate 310, a second plate 320 and a heat insulation plate 330.

[0170] The first plate 310 and the second plate 320 repel each other. This means that there is a repulsive force between the first plate 310 and the second plate 320, allowing the first plate 310 to exert force on one of the adjacent battery cells 200. Figure 2 The second plate 320 exerts a repulsive force upwards in the X direction on the other battery cell 200. Figure 2 The repulsive force pointing downwards in the X direction causes... Figure 2 200 battery cells with the X-direction facing upwards and Figure 2 The battery cells 200 facing downwards in the X direction exert a force on each other, causing them to move away from one another.

[0171] A heat insulation plate 330 is disposed between the first plate 310 and the second plate 320, and is fixed to either the first plate 310 or the second plate 320. By disposing the heat insulation plate 330 between the first plate 310 and the second plate 320, the mutual repulsion between them reduces the possibility of the first plate 310 and the second plate 320 compressing the heat insulation plate 330, thus protecting the heat insulation plate 330 and ensuring its structural integrity. This, in turn, ensures that the heat insulation plate 330 has excellent heat insulation performance.

[0172] In some embodiments, the first plate 310 includes a first magnetic element 311, and the second plate 320 includes a second magnetic element. The first magnetic element 311 and the second magnetic element have the same magnetic poles facing each other. At least one of the first magnetic element 311 and the second magnetic element is an electromagnet, and the other is an electromagnet or a permanent magnet. When the first magnetic element 311 and the second magnetic element have the same magnetic poles facing each other, a force is generated that causes the first magnetic element 311 and the second magnetic element to move away from each other, so that the first plate 310 and the second plate 320 repel each other, thereby enabling the first plate 310 and the second plate 320 to exert a repulsive force away from each other towards the adjacent battery cell 200, respectively.

[0173] It is worth noting that at least one of the first magnetic element 311 and the second magnetic element being an electromagnet can be understood as the first magnetic element 311 being an electromagnet and the second magnetic element being a permanent magnet, or the first magnetic element 311 being a permanent magnet and the second magnetic element being an electromagnet, or both the first magnetic element 311 and the second magnetic element being electromagnets, as long as the magnetic poles of the first magnetic element 311 and the second magnetic element are oriented in the same direction as each other. This application does not impose too many restrictions on the specific type of magnet used.

[0174] In some embodiments, the first plate 310 further includes a first support plate 312, and a first magnetic element 311 is disposed on the side of the first support plate 312 facing the second plate 320. The second plate 320 further includes a second support plate, and a second magnetic element is disposed on the side of the second support plate facing the first plate 310. The first support plate 312 and the second support plate can provide stable support for the first magnetic element 311 and the second magnetic element respectively, which can greatly prevent the first magnetic element 311 and the second magnetic element from shaking or displacing under external impact, thereby ensuring the working stability of the first magnetic element 311 and the second magnetic element.

[0175] In some embodiments, the first support plate 312 has a first receiving recess on the side facing the second plate 320, and the first magnetic element 311 is disposed in the first receiving recess; and / or, the second support plate has a second receiving recess on the side facing the first plate 310, and the second magnetic element is disposed in the second receiving recess. By providing the first receiving recess and the second receiving recess, the first magnetic element 311 and the second magnetic element can be firmly connected to the first support plate 312 and the second support plate, respectively. The first magnetic element 311 and the second magnetic element are arranged opposite to each other, and after the electromagnet is energized, the first magnetic element 311 and the second magnetic element can generate a relatively stable repulsive force.

[0176] The following describes the electrical device according to an embodiment of the present invention.

[0177] An electrical device according to an embodiment of the present invention includes either the aforementioned battery pack 1000 or the aforementioned heat insulation component 300.

[0178] An electrical device according to an embodiment of the present invention includes a battery pack 1000 or a heat insulation component 300, which can improve the working performance and safety of the electrical device to a certain extent.

[0179] The electrical devices mentioned here can include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc.

[0180] Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys; spacecraft can include airplanes, rockets, space shuttles, and spacecraft; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0181] In some embodiments, the electrical device is a vehicle, which may be a pure electric vehicle or a hybrid vehicle.

[0182] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0183] Figure 3The above diagram shows six first magnetic elements 311 for illustrative purposes. However, those skilled in the art, after reading the above technical solution, will obviously understand that applying this solution to one, two, three, four, or more first magnetic elements 311 would also fall within the protection scope of this utility model.

[0184] The specific structures of the battery pack 1000, heat insulation component 300, and other components of the electrical device according to the embodiments of the present invention, such as the battery cell 200, are known to those skilled in the art and will not be described in detail here.

[0185] In this specification, the terms "embodiment," "example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0186] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that, include: A housing (100) defining a receiving cavity (110); Multiple battery cells (200) are arranged in the receiving cavity (110) along a first direction; A heat insulation assembly (300) is provided between at least two adjacent battery cells (200). The heat insulation assembly (300) includes a first plate (310), a second plate (320), and a heat insulation plate (330). The first plate (310) and the second plate (320) exert forces toward the adjacent battery cells (200) away from each other. The heat insulation plate (330) is located between the first plate (310) and the second plate (320).

2. The battery pack according to claim 1, characterized in that, The first plate (310) and the second plate (320) repel each other.

3. The battery pack according to claim 2, characterized in that, The first plate (310) includes a first magnetic element (311), and the second plate (320) includes a second magnetic element. The first magnetic element (311) and the second magnetic element have the same magnetic poles facing each other. One of the first magnetic element (311) and the second magnetic element is an electromagnet, and the other is an electromagnet or a permanent magnet.

4. The battery pack according to claim 3, characterized in that, The electromagnet is adapted to be electrically connected to an external power source; and / or The electromagnet is electrically connected to the battery cell (200).

5. The battery pack according to claim 3, characterized in that, The first plate (310) further includes a first support plate (312), the first magnetic element (311) is disposed on the side of the first support plate (312) facing the second plate (320), and the second plate (320) further includes a second support plate, the second magnetic element is disposed on the side of the second support plate facing the first plate (310).

6. The battery pack according to claim 5, characterized in that, The first support plate (312) has a first receiving recess on the side facing the second plate (320), and the first magnetic element (311) is disposed in the first receiving recess; and / or The second support plate has a second receiving recess on the side facing the first plate (310), and the second magnetic element is disposed in the second receiving recess.

7. The battery pack according to claim 5, characterized in that, The first plate (310) includes a plurality of first magnetic elements (311), which are arranged along a second direction. The second plate (320) includes a plurality of second magnetic elements, which are arranged along a second direction that intersects with the first direction.

8. The battery pack according to claim 7, characterized in that, The plurality of the first magnetic elements (311) are electrically connected to an external power source and / or a battery cell (200) via a first wiring portion (500); and / or, Multiple second magnetic components are electrically connected to an external power source and / or battery cell (200) via a second wiring section.

9. The battery pack according to any one of claims 5-8, characterized in that, The thickness of the first support plate (312) is 0.5 mm to 5 mm; and / or The thickness of the second support plate is 0.5mm to 5mm.

10. The battery pack according to any one of claims 3-8, characterized in that, The thickness of the first magnetic element (311) is 0.2 mm to 5 mm; and / or The thickness of the second magnetic component is 0.2mm to 5mm.

11. The battery pack according to any one of claims 1-8, characterized in that, The heat insulation board (330) is bonded and fixed to the first plate (310) or the second plate (320).

12. The battery pack according to any one of claims 1-8, characterized in that, The thickness of the heat insulation board (330) is 0.5mm to 5mm.

13. The battery pack according to any one of claims 1-8, characterized in that, The battery cell (200) includes a positive electrode, a solid electrolyte, and a negative electrode stacked together.

14. The battery pack according to any one of claims 1-8, characterized in that, The first plate (310) and the second plate (320) are respectively fixed on two adjacent battery cells (200) in the first direction.

15. The battery pack according to any one of claims 1-8, characterized in that, It also includes a pressure sensor (400) disposed between the thermal insulation assembly (300) and the battery cell (200).

16. The battery pack according to claim 15, characterized in that, The pressure sensor (400) is fixed to the side of the first plate (310) facing the battery cell (200); and / or, the pressure sensor (400) is fixed to the side of the second plate (320) facing the battery cell (200).

17. The battery pack according to claim 15, characterized in that, The pressure sensor (400) includes a plurality of strain gauges (410) arranged along a second direction.

18. The battery pack according to claim 17, characterized in that, The plurality of strain gauges (410) are electrically connected to the controller of the battery pack via a third wiring section (600).

19. A thermal insulation component (300), characterized in that, The heat insulation component (300) is disposed between two adjacent battery cells (200), and the heat insulation component (300) includes: The first plate (310) and the second plate (320) are mutually repulsive; A heat insulation plate (330) is disposed between the first plate body (310) and the second plate body (320), and the heat insulation plate (330) is fixed to the first plate body (310) or the second plate body (320).

20. The thermal insulation component (300) according to claim 19, characterized in that, The first plate (310) includes a first magnetic element (311), and the second plate (320) includes a second magnetic element. The first magnetic element (311) and the second magnetic element have the same magnetic poles facing each other. One of the first magnetic element (311) and the second magnetic element is an electromagnet, and the other is an electromagnet or a permanent magnet.

21. The thermal insulation component (300) according to claim 20, characterized in that, The first plate (310) further includes a first support plate (312), the first magnetic element (311) is disposed on the side of the first support plate (312) facing the second plate (320), and the second plate (320) further includes a second support plate, the second magnetic element is disposed on the side of the second support plate facing the first plate (310).

22. The thermal insulation component (300) according to claim 21, characterized in that, The first support plate (312) has a first receiving recess on the side facing the second plate (320), and the first magnetic element (311) is disposed in the first receiving recess; and / or The second support plate has a second receiving recess on the side facing the first plate (310), and the second magnetic element is disposed in the second receiving recess.

23. An electrical appliance, characterized in that, Includes the battery pack according to any one of claims 1-18; or Includes the thermal insulation component (300) according to any one of claims 19-22.

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