High-voltage box, battery, electric device and energy storage device

Abstract

The utility model discloses a high-voltage box, a battery, a power utilization device and an energy storage device. The high-voltage box comprises a box body; the safety capacitor is arranged in the box body, the safety capacitor comprises a capacitor shell and a circuit board, the circuit board is arranged in the capacitor shell, at least one safety capacitor is integrated on the circuit board, and a first connecting end and a second connecting end of each safety capacitor are used for being electrically connected with a high-voltage end and a grounding end respectively. The reliability of the high-voltage box and even the battery can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a high-voltage box, a battery, an electrical device and an energy storage device. Background Art

[0002] New energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in areas such as energy storage.

[0003] In new energy vehicles equipped with batteries, the batteries can be used to provide power in whole or in part. In the field of energy storage, the batteries can be installed in the energy storage box or directly on the user side.

[0004] In these application scenarios, higher requirements are placed not only on the high energy density of the battery, but also on the reliability of the battery. Utility Model Content

[0005] In order to solve the above technical problems, the present application provides a high-reliability high-voltage box, a battery, an electrical device and an energy storage device.

[0006] In a first aspect of an embodiment of the present application, a high-voltage box is provided, comprising: a box body; a safety capacitor, which is arranged in the box body, and the safety capacitor comprises a capacitor housing and a circuit board, and the circuit board is arranged in the capacitor housing, and at least one safety capacitor is integrated on the circuit board, and the first connection end and the second connection end of each of the safety capacitors are respectively used to be electrically connected to the high voltage end and the ground end.

[0007] By integrating the safety capacitor into the circuit board and encapsulating it in the capacitor housing, the overall structure of the capacitor has the characteristics of integration and miniaturization, and can be conveniently arranged in the high-voltage box. Therefore, without affecting the energy density of the battery, the degree of damage to the electrical components caused by abnormal pulse voltage is reduced, the electrical components are protected, and the reliability of the high-voltage box and even the battery is improved.

[0008] In some embodiments, the circuit board is further integrated with a first capacitor connector and a second capacitor connector, the first capacitor connector and the second capacitor connector are electrically connected to the first connection end and the second connection end respectively, the first capacitor connector is used to be electrically connected to the high voltage end, and the second capacitor connector is used to be electrically connected to the ground end.

[0009] By integrating the safety capacitor, the first capacitor connector and the second capacitor connector on the circuit board at the same time, the safety capacitor is not only more integrated, but also has a simplified structure and can improve installation convenience.

[0010] In some embodiments, the first capacitive connector includes a first plug connector and the second capacitive connector includes a second plug connector.

[0011] The first capacitor connector and the second capacitor connector are electrically connected to the high voltage terminal and the ground terminal respectively by plugging, so the installation is more efficient and reliable.

[0012] In some embodiments, the capacitor housing is provided with a first opening and a second opening, and the first plug connector and the second plug connector are exposed through the first opening and the second opening respectively.

[0013] By exposing the first plug connector and the second plug connector through the first opening and the second opening respectively, the positions of the first plug connector and the second plug connector can be quickly found, thereby achieving efficient connection and improving the installation efficiency of the safety capacitor with the high voltage end and the grounding end.

[0014] In some embodiments, the first plug connector and the second plug connector extend out of the capacitor housing through the first opening and the second opening, respectively.

[0015] The first plug connector and the second plug connector extend out of the capacitor housing through the first opening and the second opening respectively, which facilitates plug connection with the external wiring harness and helps to determine whether it is plugged in place, thereby improving plug reliability.

[0016] In some embodiments, the capacitor housing includes a bottom shell and an upper shell, and the bottom shell is detachably connected to the upper shell.

[0017] The bottom shell and the upper shell are detachably connected, which can facilitate maintenance and replacement of circuit boards.

[0018] In some embodiments, the bottom shell is provided with a first protruding structure protruding toward the upper shell, and the first protruding structure supports a first surface of the circuit board facing the bottom shell.

[0019] By supporting the circuit board through the first protruding structure, the local stress concentration phenomenon of the circuit board can be reduced or eliminated, thereby improving the connection reliability of the integrated components on the circuit board.

[0020] In some embodiments, the upper shell is provided with at least one second protruding structure protruding toward the bottom shell, and the second protruding structure abuts against a second surface of the circuit board facing the upper shell.

[0021] By providing a first protruding structure on the bottom shell and a second protruding structure on the upper shell, the circuit board can be firmly clamped between the first protruding structure and the second protruding structure, reducing the risk of circuit board shaking, thereby improving the reliability of the safety capacitor and even the entire battery.

[0022] In some embodiments, the bottom shell includes a bottom wall and a side wall surrounding the bottom wall, the first protrusion structure is arranged on the bottom wall, the first protrusion structure includes a supporting surface and a limiting surface, the supporting surface supports the first surface, and the limiting surface is located between the side edge of the circuit board and the side wall.

[0023] The support surface and the limit surface of the first protruding structure respectively limit the freedom of the circuit board in different directions, so that the circuit board is more securely fixed in the capacitor housing, further reducing the risk of circuit board shaking, and improving the reliability of the safety capacitor and even the entire battery.

[0024] In some embodiments, the upper shell is provided with a raised portion, the safety capacitor is located between the raised portion and the circuit board, and along the raised direction of the raised portion, the absolute value of the height difference between the top of the first capacitor connector and the top of the second capacitor connector and the top of the raised portion is in the range of 0 mm to 50 mm.

[0025] Therefore, the overall height of the safety capacitor is approximately the height of the safety capacitor, which makes the overall structure of the safety capacitor more miniaturized, reduces space occupancy, and reduces the adverse effects on the volume energy density of the battery.

[0026] In some embodiments, the bottom shell is provided with connecting ears at two opposite ends along the first direction, each connecting ear is connected to the box body, and two connecting ears are staggered in a second direction, and the second direction is perpendicular to the first direction.

[0027] The two staggered connecting ears can improve the stability of the connection, and also have an anti-mistake effect during installation, thereby improving installation efficiency.

[0028] According to a second aspect of an embodiment of the present application, a battery is provided, comprising: a box body, which accommodates at least one battery cell; a high-voltage box according to the first aspect, wherein the high-voltage box is electrically connected to the high-voltage end of at least one of the battery cells, and the first connection end of the safety capacitor is electrically connected to the pole of the battery cell.

[0029] Safety capacitors can reduce the degree of damage to electrical components caused by abnormal pulse voltages, thereby protecting each electrical component. Since the safety capacitors with integrated safety capacitors are miniaturized as a whole, the safety capacitors can be smoothly arranged even when the accommodation cavity of the high-voltage box is relatively cramped. Therefore, such a design can improve the reliability of the battery without affecting the battery energy density.

[0030] In some embodiments, the pole of the battery cell is provided with a busbar component, which is used to electrically connect the battery cells to each other, and the first connection end is electrically connected to the busbar component through a first flexible connection line; and / or the second connection end of the safety capacitor is electrically connected to the ground end through a second flexible connection line.

[0031] The safety capacitor is connected to the high voltage end and the grounding end through a flexible connecting wire. The length of the flexible connecting wire can be easily adjusted, and the arrangement of the safety capacitor is more flexible, which improves the installation efficiency.

[0032] In some embodiments, the first flexible connection line is electrically connected to the first connection end via a first connector; and / or the second flexible connection line is electrically connected to the second connection end via a second connector.

[0033] The first flexible connecting wire and the second flexible connecting wire are electrically connected to the high voltage terminal and the ground terminal respectively by plugging, so that the installation is more efficient and more reliable. The third aspect of the present application provides an electrical device, the electrical device includes the battery of the second aspect, and the battery is used to provide electrical energy to the electrical device.

[0034] A third aspect of the present application provides an electrical device, the electrical device comprising the battery of the second aspect, the battery being used to provide electrical energy to the electrical device.

[0035] A fourth aspect of the present application provides an energy storage device, comprising the battery of the second aspect, wherein the battery is capable of storing electrical energy and providing electrical energy.

[0036] Utility model effect:

[0037] Through the embodiments of the present application, the reliability of the high-voltage box and even the battery, power-consuming device and energy storage device is improved while reducing the space occupied. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0039] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application;

[0040] Figure 2 An exploded schematic diagram of a battery provided for some embodiments of the present application;

[0041] Figure 3 A schematic diagram of the structure of a high-voltage box provided for some embodiments of the present application;

[0042] Figure 4 A schematic diagram of the structure of a safety capacitor provided in some embodiments of the present application;

[0043] Figure 5 An exploded schematic diagram of a safety capacitor provided for some embodiments of the present application;

[0044] Figure 6 A schematic structural diagram of an upper cover of a safety capacitor provided in some embodiments of the present application;

[0045] Figure 7 A schematic structural diagram of a bottom shell of a safety capacitor provided in some embodiments of the present application;

[0046] Figure 8 A schematic structural diagram of a safety capacitor of a safety capacitor provided in some embodiments of the present application.

[0047] Description of reference numerals:

[0048] 1000-Vehicle; 100-Battery; 200-Controller; 300-Motor;

[0049] 10-battery cell;

[0050] 20-box body; 21-lower box body; 22-upper cover;

[0051] 30-high voltage box; 31-box body; 32-safety capacitor; 311-high voltage input interface; 312-low voltage connection interface; 313-maintenance switch; 321-capacitor housing; 321a-first opening; 321b-second opening; 321c-raised portion; 322-circuit board; 322a-second surface; 322b-first surface; 323-safety capacitor; 323a-first connection end; 323b-second connection end; 324-first capacitor connector; 324a-first plug connector; 325-second capacitor connector; 325a-second plug connector; 326-first protruding structure; 326a-supporting surface; 326b-limiting surface; 327-second protruding structure; 328-connecting ear; 3211-bottom shell; 3211a-bottom wall; 3211b-side wall; 3212-upper shell;

[0052] X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0053] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions.

[0055] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0056] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0057] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0058] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0059] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0060] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0061] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0062] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0063] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0064] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0065] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0066] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc., treated with silver surface, may be used. The composite current collector may include a polymer material base and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0067] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other traditional materials that can be used as positive electrode active materials for batteries may also be used. These positive electrode active materials may be used alone or in combination of two or more. Among them, examples of lithium-containing phosphates may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon.

[0068] In some embodiments, the positive electrode may be a foamed metal. The foamed metal may be a nickel foam, a copper foam, an aluminum foam, an alloy foam, or a carbon foam. When the foamed metal is used as the positive electrode, the positive electrode active material may not be provided on the surface of the foamed metal, but of course, the positive electrode active material may also be provided. As an example, a lithium source material, potassium metal or sodium metal may also be filled or / and deposited in the foamed metal, and the lithium source material is lithium metal and / or a lithium-rich material.

[0069] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0070] As an example, the negative electrode current collector may be a metal foil, a foamed metal or a composite current collector. For example, as a metal foil, aluminum or stainless steel treated with silver, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector may include a polymer material base and a metal layer. The foamed metal may be a nickel foam, a copper foam, an aluminum foam, an alloy foam, or carbon foam, etc. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.). In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0071] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0072] In some embodiments, the separator is a separator. The present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical stability and mechanical stability can be selected.

[0073] As an example, the main material of the isolation membrane can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics.

[0074] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.

[0075] In some embodiments, the battery cell further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The present application has no specific restrictions on the type of electrolyte, which can be selected according to needs. The electrolyte can be liquid, gel or solid.

[0076] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0077] In some embodiments, the electrode assembly is a laminate structure.

[0078] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets may be provided respectively, and the plurality of positive electrode sheets and the plurality of negative electrode sheets may be alternately stacked.

[0079] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet may be folded to form a plurality of stacked folded segments, with a positive electrode sheet being sandwiched between adjacent folded segments.

[0080] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of folded sections that are stacked.

[0081] As an example, a plurality of separators may be provided, each of which is provided between any adjacent positive electrode sheets or negative electrode sheets.

[0082] As an example, the separator may be disposed continuously, and may be disposed between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0083] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0084] In some embodiments, the electrode assembly is provided with tabs, which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0085] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0086] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in this application.

[0087] In some embodiments, the housing includes an end cap and a shell, the shell is provided with an opening, and the end cap closes the opening to form a closed space for accommodating substances such as the electrode assembly and the electrolyte. The shell may be provided with one or more openings. One or more end caps may also be provided.

[0088] In some embodiments, at least one electrode terminal is disposed on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal may be directly connected to the tab, or indirectly connected to the tab via a transition component. The electrode terminal may be disposed on the end cap, or on the housing.

[0089] In some embodiments, a pressure relief mechanism is provided on the housing, and the pressure relief mechanism is used to release the internal pressure of the battery cell.

[0090] The battery mentioned in the embodiments of the present application may include a battery module, which includes a single physical module composed of one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in mixed connection through a busbar. Multiple battery cells are arranged and fixed to form a battery module.

[0091] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.

[0092] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0093] Below, this application is described in detail.

[0094] At present, new energy batteries are increasingly used in life and industry. New energy batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric motorcycles and electric cars, as well as in aerospace and other fields. With the continuous expansion of battery application areas, higher requirements are placed not only on the volume and energy density of batteries, but also on the reliability of batteries.

[0095] The high-voltage box serves as the high-voltage control system of the battery and is used to control the connection or disconnection of the high-voltage circuit according to the user's power demand. The power on and off of the high-voltage circuit and the change of load may generate abnormal pulse voltage, which may cause damage to electrical components (such as high-voltage relays, current sensors, fuses, etc. in the high-voltage box). With the continuous increase in high-power power demand, the degree of damage to electrical components may further increase, which may lead to the risk of failure of the high-voltage control system and have an adverse effect on the reliability of the battery.

[0096] After research, it was found that absorbing and releasing the abnormal pulse voltage in the high-voltage circuit can reduce the degree of damage to electrical components. After further research, it was found that by connecting a safety capacitor between the high-voltage end and the wiring terminal of the battery, the abnormal pulse voltage can be absorbed and released. In addition, the safety capacitor is integrated and miniaturized to facilitate its arrangement in the compact internal space of the high-voltage box, without reducing the volume energy density of the battery, and can also protect various electrical components.

[0097] Based on such a design concept, the present application provides a high-voltage box, including: a box body; a safety capacitor, which is arranged in the box body, the safety capacitor includes a capacitor housing and a circuit board, the circuit board is arranged in the capacitor housing, and at least one safety capacitor is integrated on the circuit board, and the first connection end and the second connection end of each safety capacitor are respectively used to electrically connect to the high voltage end and the ground end.

[0098] By integrating the safety capacitor into the circuit board and encapsulating it in the capacitor housing, the overall structure of the capacitor has the characteristics of integration and miniaturization, and can be conveniently arranged in the high-voltage box. Therefore, without reducing the energy density of the battery, it can absorb and release abnormal pulse voltage, thereby reducing the degree of damage to electrical components, thereby protecting various electrical components and improving the reliability of the high-voltage box and even the battery.

[0099] The high-voltage box of the embodiment of the present application can be applied to a battery. Since the overall structure of the capacitor is integrated and miniaturized and can protect various electrical components, the reliability of the battery is improved without affecting the high energy density of the battery volume.

[0100] The battery provided in the embodiments of the present application can be used, but is not limited to, in power storage systems, vehicles, ships, aircraft and other electrical devices.

[0101] The embodiment of the present application provides an electric device including the above-mentioned battery for providing electric energy, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0102] In the following embodiments, for the convenience of description, the electric device of one embodiment of the present application is taken as a vehicle 1000 as an example for description. The following is a description with reference to the accompanying drawings.

[0103] Figure 1 The schematic diagram of the structure of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle. Figure 1 As shown, a battery 100 is disposed inside the vehicle 1000, and the battery 100 can be disposed at the bottom, head, or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000, for example, the battery 100 can be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating, and operating power requirements of the vehicle 1000 during driving.

[0104] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0105] like Figure 2 As shown, the battery 100 includes a box body 20 and at least one battery cell 10 . The box body 20 includes a lower box body 21 and an upper cover 22 . The upper cover 22 covers the lower box body 21 , thereby forming a storage space for the battery cell 10 between the lower box body 21 and the upper cover 22 .

[0106] In the battery 100, there can be multiple battery cells 10, and the multiple battery cells 10 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the multiple battery cells 10 are both connected in series and in parallel. The multiple battery cells 10 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 10 is placed in the accommodation space formed by the lower box 21 and the upper cover 22; of course, the battery 100 can also be a battery module formed by connecting multiple battery cells 10 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and are accommodated in the accommodation space formed by the lower box 21 and the upper cover 22. The battery 100 may also include other structures. For example, the battery 100 may also include a confluence component for realizing electrical connection between the multiple battery cells 10.

[0107] Below, refer to Figures 3 to 8 Some embodiments of the present application are described in detail.

[0108] The embodiment of the present application provides a high-voltage box 30, including: a box body 31; a safety capacitor 32, which is arranged in the box body 31, and the safety capacitor 32 includes a capacitor housing 321 and a circuit board 322, and the circuit board 322 is arranged in the capacitor housing 321. At least one safety capacitor 323 is integrated on the circuit board 322, and the first connection end 323a and the second connection end 323b of each safety capacitor 323 are respectively used to be electrically connected to the high voltage end and the ground end.

[0109] The high-voltage box 30 has a high-voltage control function and is used to connect between at least one battery cell 10 and an electrical device. It can connect or disconnect the high-voltage circuit based on power requirements, etc. The high-voltage box 30 includes a box body 31, and the box body 31 has a receiving cavity for receiving electrical components. As an example, the electrical components may include high-voltage relays, current sensors, fuses, etc. The high-voltage relay can be used to control the on and off of the high-voltage circuit, the current sensor can be used for current collection, and the fuse can play a role in overcurrent protection. The high-voltage box 30 is electrically connected to at least one battery cell 10. The box body 31 can be a metal box body, such as an aluminum shell, a copper shell, an aluminum alloy shell, a stainless steel shell, etc.

[0110] At least one safety capacitor 323 is integrated on the circuit board 322. The first connection end 323a and the second connection end 323b of each safety capacitor 323 are respectively used to be electrically connected to the high-voltage end and the ground end. The high-voltage end is the end where the battery cell 10 inputs high voltage to the high-voltage box 30. The first connection end 323a of the safety capacitor 323 can be directly or indirectly connected to the high-voltage end. For example, the first connection end 323a of the safety capacitor 323 is electrically connected to the pole of the battery cell 10 through the high-voltage input interface 311 on the high-voltage box 30, the connector (such as a copper bar) connecting the high-voltage input interface 311 of the high-voltage box 30 and the high-voltage output interface, the high-voltage wiring harness between the battery cell 10 and the high-voltage input interface 311, and at least one of the busbars that electrically connect the battery cells 10 to each other. The output interface of the high-voltage box 30 can be used to connect to an electrical device.

[0111] The grounding terminal can be a metal battery box 20 or a metal box 31. Of course, the grounding terminal can also be other metal parts used as grounding. In other words, the second connection end 323b of each safety capacitor 323 can be electrically connected to the battery box 20 or the box 31 or other metal parts used as grounding.

[0112] In some embodiments, reference Figure 3 The box body 31 may further include a low voltage connection interface 312, a maintenance switch 313, etc. For example, the maintenance switch 313 may be a manual maintenance switch (Manual Service Disconnect, MSD).

[0113] As an example, see Figure 5 and Figure 8 The safety capacitor 323 is installed on the circuit board 322 and the two pins (the first connection end 323a and the second connection end 323b) of the safety capacitor 323 are respectively connected to the wiring (printed circuit) on the circuit board 322, and the two pins of each safety capacitor 323 are respectively electrically connected to the high voltage end and the power connection end of the battery 100 through the wiring (printed circuit) on the circuit board 322.

[0114] The number of the safety capacitor 323 can be one or more. For example, two safety capacitors 323 are integrated on the circuit board 322 .

[0115] The safety capacitor 32 can reduce the degree of damage to electrical components caused by abnormal pulse voltage, so that each electrical component is protected. Since the safety capacitor 323 is integrated on the circuit board 322, the safety capacitor 32 has the characteristics of integration and miniaturization. Even in the relatively cramped space of the high-voltage box 30, the safety capacitor 32 can be smoothly arranged. Therefore, such a design can improve the reliability of the high-voltage box 30 and even the entire battery 100 without affecting the battery energy density.

[0116] In some embodiments, the circuit board 322 is further integrated with a first capacitor connector 324 and a second capacitor connector 325, and the first capacitor connector 324 and the second capacitor connector 325 are electrically connected to the first connection end 323a and the second connection end 323b respectively. The first capacitor connector 324 is used to be electrically connected to the high voltage end, and the second capacitor connector 325 is used to be electrically connected to the ground end.

[0117] The first capacitor connector 324 and the second capacitor connector 325 can be electrically connected to the first connection end 323a and the second connection end 323b of the safety capacitor 323 through their respective traces on the circuit board 322. The first connection end 323a and the second connection end 323b of the safety capacitor 323 are electrically connected to the high voltage end and the ground end through the first capacitor connector 324 and the second capacitor connector 325, respectively. For example, the first capacitor connector 324 and the second capacitor connector 325 can be electrically connected to the high voltage end and the ground end through an external wiring harness (such as a flexible connection line to be described later), respectively, to improve installation convenience and flexibility.

[0118] As an example, see Figure 5 Along the first direction X, the first capacitor connector 324 and the second capacitor connector 325 are respectively located on both sides of the safety capacitor 323. Along the second direction Y, the two safety capacitors 323 are distributed in sequence. Such a design makes the safety capacitor 32 more compact as a whole.

[0119] By integrating the safety capacitor 323 , the first capacitor connector 324 and the second capacitor connector 325 on the circuit board 322 , the safety capacitor 32 is not only more integrated, but also has a simplified structure and can improve installation convenience.

[0120] In some embodiments, the first capacitive connector 324 includes a first plug connector 324a, and the second capacitive connector 325 includes a second plug connector 325a.

[0121] The first plug connector 324a and the second plug connector 325a are used to connect to the high voltage terminal and the ground terminal of the battery by plugging. The first plug connector 324a and the second plug connector 325a can be round plug connectors, square plug connectors or plug connectors of other shapes. In addition, any one of the first plug connector 324a and the second plug connector 325a can be a male connector or a female connector.

[0122] The first capacitor connector 324 and the second capacitor connector 325 are electrically connected to the high voltage terminal and the ground terminal respectively by plugging, so that the installation is more efficient and reliable.

[0123] In some embodiments, the capacitor housing 321 is provided with a first opening 321 a and a second opening 321 b , and the first plug connector 324 a and the second plug connector 325 a are exposed through the first opening 321 a and the second opening 321 b , respectively.

[0124] The first plug-in connector 324a and the second plug-in connector 325a are exposed through the first opening 321a and the second opening 321b respectively. It can be understood that the first plug-in connector 324a and the second plug-in connector 325a are respectively completely located inside the capacitor housing 321, that is, they do not extend out of the first opening 321a and the second opening 321b, and are thus exposed; or the first plug-in connector 324a and the second plug-in connector 325a pass through the first opening 321a and the second opening 321b respectively, so that the first plug-in connector 324a and the second plug-in connector 325a are respectively partially located outside the capacitor housing 321, and are thus exposed; or the top of the first plug-in connector 324a and the top of the second plug-in connector 325a are respectively flush with the first opening 321a and the second opening 321b, and are thus exposed.

[0125] By exposing the first plug connector 324a and the second plug connector 325a through the first opening 321a and the second opening 321b respectively, the first plug connector 324a and the second plug connector 325a can be quickly located, thereby achieving efficient connection and improving the installation efficiency of the safety capacitor 32 with the high voltage end and the grounding end.

[0126] In some embodiments, the first plug connector 324a and the second plug connector 325a extend out of the capacitor housing 321 through the first opening 321a and the second opening 321b, respectively.

[0127] One end of the first plug-in connector 324a is located inside the capacitor housing 321 and connected to the circuit board 322, and the other end (plug interface end) passes through the first opening 321a and is located outside the capacitor housing 321. One end of the second plug-in connector 325a is located inside the capacitor housing 321 and connected to the circuit board 322, and the other end (plug interface end) passes through the second opening 321b and is located outside the capacitor housing 321.

[0128] The first plug connector 324a and the second plug connector 325a extend out of the capacitor housing 321 through the first opening 321a and the second opening 321b respectively, which facilitates plug connection with an external wiring harness and helps to determine whether it is plugged in place, thereby improving plug reliability.

[0129] In some embodiments, the capacitor housing 321 includes a bottom housing 3211 and an upper housing 3212 , and the bottom housing 3211 and the upper housing 3212 are detachably connected.

[0130] The bottom shell 3211 and the upper shell 3212 are connected to form a receiving space for receiving the circuit board 322 integrated with the safety capacitor 323, the first capacitor connector 324 and the second capacitor connector 325. The bottom shell 3211 and the upper shell 3212 can be detachably connected by snapping, plugging or other methods.

[0131] As an example, see Figure 5 The side wall 3211b of the bottom shell 3211 is provided with a plurality of first clamping parts distributed along the circumferential direction, and the side wall of the upper shell 3212 is provided with a plurality of second clamping parts distributed along the circumferential direction and cooperating with the first clamping parts, wherein one of the first clamping part and the second clamping part is a clamping hole, and the other is a buckle.

[0132] The detachable connection between the bottom shell 3211 and the upper shell 3212 can facilitate maintenance and replacement of the circuit board 322 .

[0133] In some embodiments, the bottom shell 3211 is provided with a first protruding structure 326 protruding toward the upper shell 3212 , and the first protruding structure 326 supports the first surface 322 b of the circuit board 322 facing the bottom shell 3211 .

[0134] The first protrusion structure 326 may be a continuous protrusion structure, or a plurality of protrusion structures arranged at intervals. Figure 5 First protruding structures 326 are respectively disposed at the four corner positions and the middle position of the bottom shell 3211 , so as to support multiple positions of the circuit board 322 .

[0135] By supporting the circuit board 322 with the first protruding structure 326, the local stress concentration phenomenon of the circuit board 322 can be reduced or eliminated, and the connection reliability of the integrated components on the circuit board 322 can be improved. In the related art, the circuit board is usually fixed by fasteners, which will cause the problem of local stress concentration on the circuit board 322, which is easy to cause the risk of cracking at the welding position of the components on the circuit board 322, resulting in poor connection reliability.

[0136] In some embodiments, the upper shell 3212 is provided with at least one second protrusion structure 327 ( Figure 6 As shown in FIG. 3 , the second protruding structure 327 abuts against the second surface 322 a of the circuit board 322 facing the upper shell 3212 .

[0137] The second protrusion structure 327 may be a continuous protrusion structure, or a plurality of protrusion structures arranged at intervals. The position of the second protrusion structure 327 may correspond to or may not correspond to the position of the first protrusion structure 326. For example, a plurality of second protrusion structures 327 are provided, and the plurality of second protrusion structures 327 are distributed along the circumference of the upper shell 3212.

[0138] By setting a first protrusion structure 326 on the bottom shell 3211 and a second protrusion structure 327 on the upper shell 3212, the circuit board 322 can be firmly clamped between the first protrusion structure 326 and the second protrusion structure 327, reducing the risk of shaking of the circuit board 322, thereby improving the reliability of the safety capacitor 32 and even the entire battery 100.

[0139] In some embodiments, the bottom shell 3211 includes a bottom wall 3211a and a side wall 3211b surrounding the bottom wall 3211a, and the first protruding structure 326 is disposed on the bottom wall 3211a. The first protruding structure 326 includes a supporting surface 326a and a limiting surface 326b. The supporting surface 326a supports the first surface 322b, and the limiting surface 326b is located between the side edge of the circuit board 322 and the side wall 3211b.

[0140] The supporting surface 326a supports the first surface 322b to limit the freedom of the circuit board 322 in the third direction Z. The limiting surface 326b is located between the side edge of the circuit board 322 and the side wall 3211b. The limiting surface 326b limits the freedom of the circuit board 322 in the first direction X and / or the second direction Y, wherein the first direction X is perpendicular to the second direction Y and both are perpendicular to the third direction Z.

[0141] As an example, see Figure 5 A first protruding structure 326 is respectively arranged at the four corners of the bottom shell 3211. Each first protruding structure 326 includes a supporting surface 326a and a limiting surface 326b. The multiple supporting surfaces 326a jointly support the first surface 322b of the circuit board 322. The multiple limiting surfaces 326b surround the circuit board 322 and respectively contact the side edges of the circuit board 322.

[0142] The support surface 326a and the limiting surface 326b of the first protrusion structure 326 respectively limit the freedom of the circuit board 322 in different directions, so that the circuit board 322 is more firmly fixed in the capacitor housing 321, further reducing the risk of shaking of the circuit board 322 and improving the reliability of the safety capacitor 32 and even the entire battery 100.

[0143] In some embodiments, the upper shell 3212 is provided with a raised portion 321c, and the safety capacitor 323 is located between the raised portion 321c and the circuit board 322. Along the raised direction of the raised portion 321c, the absolute value of the height difference between the top of the first capacitor connector 324 and the top of the second capacitor connector 325 and the top of the raised portion 321c is in the range of 0 mm to 50 mm.

[0144] It can be understood that the top of the first capacitor connector 324 and the top of the second capacitor connector 325 are respectively flush with the top of the protrusion 321c or respectively higher than the top of the protrusion 321c or lower than the top of the protrusion 321c.

[0145] By way of example, the above height difference can be, for example, -50mm, -40mm, -30mm, -20mm, -10mm, -8mm, -7mm, -6mm, -5mm, -4mm, -3mm, -2mm, -1mm, 0mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 20mm, 30mm, 40mm, 50mm.

[0146] Therefore, the overall height of the safety capacitor 32 is approximately the sum of the height of the safety capacitor 323 and the wall thickness of the upper shell 3212, so that the overall structure of the safety capacitor 32 is more miniaturized, reducing space occupancy and reducing the adverse effects on the volume energy density of the battery.

[0147] In some embodiments, the bottom shell 3211 is provided with connecting ears 328 at opposite ends along the first direction X, each connecting ear 328 is connected to the box body 31, and the two connecting ears 328 are staggered in the second direction Y, and the second direction Y is perpendicular to the first direction X.

[0148] The staggered arrangement of the two connecting ears 328 in the second direction Y means that the connection points of the two connecting ears 328 are not at the same position in the second direction Y.

[0149] As an example, see Figure 7 Each connecting ear 328 is provided with a mounting hole for a fastener to pass through, and the centers of the two mounting holes are staggered in the second direction Y.

[0150] The two staggered connection ears 328 can improve the connection stability, and also have an anti-mistake effect during installation, thereby improving the installation efficiency.

[0151] The embodiment of the present application also provides a battery 100, including: a box body 20, which accommodates at least one battery cell 10; the high-voltage box 30 mentioned above, the high-voltage box 30 is electrically connected to at least one battery cell 10, and the first connection end 323a of the safety capacitor 323 is electrically connected to the pole of the battery cell 10.

[0152] As described above, the pole of the battery cell 10 is used as a high-voltage end to transmit high voltage to the high-voltage box 30, and the first connection end 323a of the safety capacitor 323 can be directly or indirectly connected to the pole. For example, the first connection end 323a of the safety capacitor 323 is connected to the high-voltage end of the battery cell 10 through at least one of the high-voltage input interface 311 on the high-voltage box 30, the connector (such as a copper bar) connecting the high-voltage input interface 311 of the high-voltage box 30 and the high-voltage output interface, and the high-voltage wiring harness between the battery cell 10 and the high-voltage input interface 311.

[0153] As an example, the high-voltage box 30 is arranged in the box body 20, and the box body 31 of the high-voltage box 30 includes a high-voltage input interface 311 and a high-voltage output interface connected to the high-voltage input interface 311. The high-voltage input interface 311 is connected to at least one battery cell 10 through a high-voltage wiring harness, and the high-voltage output interface is used to connect an electrical device.

[0154] The safety capacitor 32 can reduce the degree of damage to electrical components caused by abnormal pulse voltage, so that each electrical component is protected. Since the safety capacitor 32 integrated with the safety capacitor 323 is miniaturized as a whole, the safety capacitor 32 can be smoothly arranged even when the accommodating cavity of the high-voltage box 30 is relatively cramped. Therefore, such a design can improve the reliability of the battery without affecting the battery energy density.

[0155] In some embodiments, the pole of the battery cell 10 is provided with a busbar component, which is used to electrically connect the battery cells 10 to each other, and the first connection end 323a of the safety capacitor 323 is electrically connected to the busbar component through a first flexible connection line (not shown in the figure); and / or, the second connection end 323b of the safety capacitor 323 is electrically connected to the ground terminal through a second flexible connection line (not shown in the figure).

[0156] Compared with the hard copper bar sheet, the first flexible connecting wire and the second flexible connecting wire have certain flexibility and are convenient for bending.

[0157] The safety capacitor 323 is connected to the high voltage terminal and the ground terminal through a flexible connecting line. The length of the flexible connecting line can be easily adjusted, and the arrangement of the safety capacitor 323 is more flexible, thereby improving the installation efficiency.

[0158] In some embodiments, the first flexible connection line is electrically connected to the first connection end 323a via a first connector (not shown); and / or the second flexible connection line is electrically connected to the second connection end 323b via a second connector.

[0159] As an example, the shapes of the first connector and the second connector can be adapted to the shapes of the first connector 324a of the first capacitor connector 324 and the second connector 325a of the second capacitor connector 325, for example, they can be round connectors, square connectors or other shapes.

[0160] One end of the first flexible connecting wire is plugged into the first plug-in connector 324a of the first capacitor connector 324 through the first plug-in connector, and the other end is connected to the high-voltage end, thereby realizing the electrical connection between the first connection end 323a of the safety capacitor 323 and the high-voltage end; one end of the second flexible connecting wire is plugged into the second plug-in connector 325a of the second capacitor connector 325 through the second plug-in connector, and the other end is connected to the ground end, thereby realizing the electrical connection between the second connection end 323b of the safety capacitor 323 and the ground end.

[0161] The first flexible connecting wire and the second flexible connecting wire are respectively electrically connected to the high voltage end and the grounding end by plugging, so the installation is more efficient and more reliable.

[0162] Below, a specific example of an embodiment of the present application is described.

[0163] The battery 100 provided in the embodiment of the present application includes a box body 20 that accommodates at least one battery cell 10, and a high-voltage box 30. The high-voltage box 30 includes a box body 31 with a accommodating cavity. The box body 31 is provided with a high-voltage input interface 311 and a high-voltage output interface. The high-voltage input interface 311 is used to electrically connect to the battery cell 10, and the high-voltage output interface is used to connect to an electrical device, which may be, for example, a vehicle 1000.

[0164] The safety capacitor 32 is arranged in the box body 31, and the safety capacitor 32 includes a capacitor housing 321 and a circuit board 322. The circuit board 322 is arranged in the capacitor housing 321. Two safety capacitors 323, a first capacitor connector 324, and a second capacitor connector 325 are integrated on the circuit board 322. The first connection end 323a and the second connection end 323b of each safety capacitor 323 are electrically connected to the high-voltage end and the grounding end through the first capacitor connector 324 and the second capacitor connector 325, respectively, wherein the high-voltage end is the high-voltage input interface 311 of the high-voltage box 30, and the grounding end is the box body 31 of the high-voltage box 30. Specifically, the capacitor housing 321 includes a bottom shell 3211 and an upper shell 3212 that are detachably connected by snapping, and the bottom shell 3211 and the upper shell 3212 are connected to form a receiving cavity for integrating the safety capacitor 323, the first capacitor connector 324, and the second capacitor connector 325. The upper shell 3212 is provided with a first opening 321a and a second opening 321b for the first plug connector 324a of the first capacitor connector 324 and the second plug connector 325a of the second capacitor connector 325 to extend out, respectively. The first plug connector 324a and the second plug connector 325a are connected to the high voltage terminal and the ground terminal of the battery 100 through the first flexible connection line and the second flexible connection line, respectively. In addition, a plurality of first protruding structures 326 protruding toward the upper shell 3212 are provided on the bottom wall 3211a of the bottom shell 3211. The first protruding structures 326 include a supporting surface 326a and a limiting surface 326b. The supporting surface 326a supports the first surface 322b of the circuit board 322 facing the bottom shell 3211. The limiting surface 326b is located between the side edge of the circuit board 322 and the side wall 3211b. The upper shell 3212 is provided with at least one second protruding structure 327 ( Figure 6 As shown in FIG. 3 , the second protruding structure 327 abuts against the second surface 322a of the circuit board 322 facing the upper shell 3212, thereby firmly sandwiching the circuit board 322 between the first protruding structure 326 and the second protruding structure 327, reducing the risk of shaking of the circuit board 322, improving the anti-seismic performance of the safety capacitor 323, and improving the reliability of the safety capacitor 32. In addition, the bottom shell 3211 is provided with connecting ears 328 at opposite ends along the first direction X, each connecting ear 328 is connected to the box body 31, and the two connecting ears 328 are staggered in the second direction Y, and the second direction Y is perpendicular to the first direction X, which can improve the stability of the connection and also have an anti-mistake effect in installation.

[0165] The present application also provides an electrical device, which includes the battery mentioned above for providing electrical energy.

[0166] The present application also provides an energy storage device, including the battery for providing electrical energy mentioned above, and the battery can store electrical energy and can provide electrical energy.

[0167] The energy storage device may be an energy storage box or an energy storage cabinet. The energy storage cabinet includes a plurality of battery compartments for accommodating batteries. In addition, the energy storage cabinet may also include a thermal management component and a power control component.

[0168] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the present application.

Claims

1. A high voltage box, characterized in that: include: Box body; A safety capacitor is arranged in the box body, and the safety capacitor includes a capacitor housing and a circuit board. The circuit board is arranged in the capacitor housing, and at least one safety capacitor is integrated on the circuit board. The first connection end and the second connection end of each safety capacitor are respectively used to be electrically connected to the high voltage end and the ground end.

2. The high voltage box according to claim 1, characterized in that: The circuit board is further integrated with a first capacitor connector and a second capacitor connector, the first capacitor connector and the second capacitor connector are electrically connected to the first connection end and the second connection end respectively, the first capacitor connector is used to be electrically connected to the high voltage end, and the second capacitor connector is used to be electrically connected to the ground end.

3. The high voltage box according to claim 2, characterized in that: The first capacitor connector includes a first plug connector, and the second capacitor connector includes a second plug connector.

4. The high voltage box according to claim 3, characterized in that: The capacitor housing is provided with a first opening and a second opening, The first plug connector and the second plug connector are exposed through the first opening and the second opening, respectively.

5. The high voltage box according to claim 4, characterized in that: The first plug connector and the second plug connector extend out of the capacitor housing through the first opening and the second opening respectively.

6. The high voltage box according to any one of claims 2 to 5, characterized in that: The capacitor housing comprises a bottom housing and an upper housing, and the bottom housing is detachably connected to the upper housing.

7. The high voltage box according to claim 6, characterized in that: The bottom shell is provided with a first protruding structure protruding toward the upper shell, and the first protruding structure supports a first surface of the circuit board facing the bottom shell.

8. The high voltage box according to claim 7, characterized in that: The upper shell is provided with at least one second protruding structure protruding toward the bottom shell, and the second protruding structure abuts against a second surface of the circuit board facing the upper shell.

9. The high voltage box according to claim 7, characterized in that: The bottom shell includes a bottom wall and a side wall surrounding the bottom wall, and the first protrusion structure is arranged on the bottom wall. The first protruding structure includes a supporting surface and a limiting surface, the supporting surface supports the first surface, and the limiting surface is located between the side edge of the circuit board and the side wall.

10. The high voltage box according to claim 6, characterized in that: The upper shell is provided with a raised portion, and the safety capacitor is located between the raised portion and the circuit board. Along the protruding direction of the protruding portion, the absolute values ​​of the height differences between the top of the first capacitive connector and the top of the second capacitive connector and the top of the protruding portion are respectively in the range of 0 mm to 50 mm.

11. The high voltage box according to claim 7, characterized in that: The bottom shell is provided with connecting ears at two opposite ends along the first direction, each connecting ear is connected to the box body, and two connecting ears are staggered in a second direction, and the second direction is perpendicular to the first direction.

12. A battery, characterized in that: include: A box body containing at least one battery cell; The high-voltage box according to any one of claims 1 to 11, wherein the high-voltage box is electrically connected to at least one of the battery cells, and the first connection end of the safety capacitor is electrically connected to the pole of the battery cell.

13. The battery according to claim 12, characterized in that The poles of the battery cells are provided with a busbar component, and the busbar component is used to electrically connect the battery cells to each other; The first connection end is electrically connected to the busbar component via a first flexible connection line; and / or, The second connection end of the safety capacitor is electrically connected to the ground end through a second flexible connection line.

14. The battery according to claim 13, characterized in that The first flexible connecting wire is electrically connected to the first connecting end via a first plug connector; and / or, The second flexible connecting wire is electrically connected to the second connecting end through a second plug-in connector.

15. An electrical device, characterized in that: The electrical device comprises the battery according to any one of claims 12 to 14, and the battery is used to provide electrical energy for the electrical device.

16. An energy storage device, characterized in that: A battery comprising any one of claims 12 to 14, wherein the battery is capable of storing electrical energy and providing electrical energy.

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