Battery and electric device

Abstract

The utility model provides a battery and a power utilization device, and belongs to the technical field of batteries. The battery comprises a fixing piece and a battery monomer, the fixing member has a first surface. The battery cell comprises a shell and an electrode assembly, the electrode assembly is accommodated in the shell, the shell is provided with a wall part, the wall part is provided with a second surface deviating from the electrode assembly, and the second surface is arranged facing the first surface along the thickness direction of the wall part. One of the first surface and the second surface is provided with a clamping groove, the other one is provided with a clamping part, and the clamping part is matched with the clamping groove in an inserted mode. According to the battery, the battery monomers can be fastened on the fixing pieces to fasten and limit the battery monomers, so that the structural stability and reliability of assembling the battery monomers into the battery can be improved, the phenomena of shaking or shifting and the like of the battery monomers in the use process are reduced, and the service life of the battery is prolonged. Therefore, risks such as displacement of the single battery or mutual collision with other parts can be effectively reduced, so that the use stability and the service life of the battery are improved, and the service life of the battery is prolonged.

Description

Technical Field

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

[0002] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable and important role. The battery consists of a box and battery cells contained in the box. As the core component of new energy vehicles, batteries have high requirements in terms of stability in use and service life.

[0003] In battery technology, a battery generally includes a casing and battery cells contained in the casing. The casing serves to provide an assembly space for the battery cells. However, in the use of existing batteries, it is very easy for the battery cells to shift or collide in the casing, which causes the battery cells to be easily damaged, resulting in poor stability in use and a short service life. Utility Model Content

[0004] The embodiments of the present application provide a battery and an electrical device, which can effectively improve the stability and service life of the battery.

[0005] In the first aspect, an embodiment of the present application provides a battery, comprising a fixing and a battery cell; the fixing has a first surface; the battery cell comprises a shell and an electrode assembly, the electrode assembly is accommodated in the shell, the shell has a wall portion, the wall portion has a second surface facing away from the electrode assembly, and along the thickness direction of the wall portion, the second surface is arranged facing the first surface; wherein one of the first surface and the second surface is provided with a card slot, and the other is provided with a card connection portion, and the card connection portion is plugged into and matched with the card slot.

[0006] In the above technical solution, the fixing part of the battery cell has a first surface, and the wall part of the outer shell of the battery cell has a second surface. The first surface and the second surface are arranged facing each other. By providing a slot on one of the first surface and the second surface and providing a snap-in portion on the other, the snap-in cooperation between the snap-in portion and the slot can fasten the battery cell to the fixing part, so as to fasten and limit the battery cell, thereby improving the structural stability and reliability of the battery cell when assembled into the battery, reducing the shaking or movement of the battery cell during use, and further effectively reducing the risk of displacement of the battery cell or collision with other components, so as to improve the stability and service life of the battery.

[0007] In some embodiments, the first surface abuts the second surface.

[0008] In the above technical solution, by making the second surface of the wall portion abut against the first surface of the fixing member, the wall portion is a structure that abuts against the fixing member, thereby further improving the assembly stability between the battery cell and the fixing member, and improving the effect of the mutual plug-in cooperation between the clamping portion and the clamping slot. In addition, by setting the second surface of the wall portion and the first surface of the fixing member to abut against each other, the size of the gap between the battery cell and the fixing member can be reduced, thereby saving the space jointly occupied by the battery cell and the fixing member in the thickness direction of the wall portion, which is conducive to improving the internal space utilization of the battery.

[0009] In some embodiments, one of the first surface and the second surface is provided with a plurality of card slots, and the other is provided with a plurality of card connection portions, and each card connection portion is plug-fitted with a card slot.

[0010] In the above technical solution, multiple card slots are arranged on one of the first surface of the fixing member and the second surface of the wall portion, and multiple card connecting parts are arranged on the other, and each card connecting part can be plugged into and matched with a card slot, so that the battery cell can be a structure in which multiple card connecting parts and multiple card slots cooperate with each other to be fastened to the fixing member, which is beneficial to further improve the effect of fastening and limiting the battery cell, so as to further reduce the phenomenon of shaking or moving of the battery cell during use, and further reduce the risk of displacement of the battery cell or collision with other components, so as to improve the stability and service life of the battery.

[0011] In some embodiments, the battery cell also includes a pressure relief mechanism, which is arranged on the wall portion, and the pressure relief mechanism is configured to release the internal pressure of the battery cell; wherein an exhaust cavity is formed inside the fixing member, and a pressure relief port is arranged on the first surface, the pressure relief port is connected to the exhaust cavity, and the pressure relief mechanism and the pressure relief port are arranged opposite to each other along the thickness direction of the wall portion.

[0012] In the above technical solution, an exhaust cavity is further provided inside the fixing part, and a pressure relief port which is interconnected with the exhaust cavity is provided on the first surface of the fixing part. By setting the pressure relief mechanism of the battery cell to a structure which is arranged opposite to the pressure relief port in the thickness direction of the wall portion, when thermal runaway occurs in the battery cell, the gas released by the pressure relief mechanism can directly enter the exhaust cavity through the pressure relief port, and be further discharged through the exhaust cavity. On the one hand, a battery adopting such a structure does not need to separately provide an exhaust component for the pressure relief mechanism arranged on the wall portion, which is conducive to reducing the difficulty of assembling the battery and reducing the manufacturing cost of the battery. On the other hand, it can improve the exhaust smoothness of the pressure relief mechanism arranged on the wall portion, which is conducive to alleviating the phenomenon that the pressure relief mechanism is blocked or blocked by the fixing part, so as to improve the pressure relief rate of the battery cell, thereby reducing the risk of explosion or bursting of the battery cell due to untimely pressure relief, so as to improve the reliability of the battery. In addition, in the structure in which the battery cell and the fixing part are assembled with each other through the clamping part and the clamping groove, the phenomenon of the battery cell moving when the pressure relief mechanism releases pressure can be alleviated, so as to reduce the risk of the pressure relief mechanism being misaligned with the pressure relief port due to the movement of the battery cell, thereby improving the stability and reliability of the pressure relief of the battery cell during thermal runaway.

[0013] In some embodiments, along the thickness direction of the wall portion, a projection of the pressure relief mechanism is located inside the pressure relief port.

[0014] In the above technical solution, by setting the projection of the pressure relief mechanism in the thickness direction of the wall to be located within the pressure relief port, the pressure relief port can receive the gas released from any position of the pressure relief mechanism, thereby further improving the exhaust smoothness of the pressure relief mechanism arranged on the wall, thereby further improving the pressure relief rate of the battery cell.

[0015] In some embodiments, a flow channel is formed inside the fixing member, and the flow channel is used to accommodate a heat exchange medium, and the heat exchange medium is configured to exchange heat with the battery cell.

[0016] In the above technical solution, a flow channel is further provided inside the fixing part so that the flow channel of the fixing part can accommodate a heat exchange medium for heat exchange with the battery cell, so that the fixing part can also play a role in managing the temperature of the battery cell. The battery adopting this structure can, on the one hand, integrate the thermal management component for managing the temperature of the battery cell into the fixing part, which is beneficial to reduce the difficulty of assembling the battery and the manufacturing cost of the battery. On the other hand, in the structure in which the battery cell and the fixing part are assembled with each other through the clamping part and the clamping groove, the contact area between the battery cell and the fixing part can be increased, thereby increasing the heat exchange area between the battery cell and the fixing part, so as to enhance the effect of the fixing part in managing the temperature of the battery cell.

[0017] In some embodiments, along the thickness direction of the wall portion, both sides of the fixing member have first surfaces, and both sides of the fixing member are provided with battery cells, and the second surfaces of the battery cells on both sides of the fixing member are arranged facing each other.

[0018] In the above technical solution, the fixing member has a first surface on both sides in the thickness direction of the wall portion, so that battery cells can be arranged on both sides of the fixing member, so that the battery cells located on both sides of the fixing member can be fixed and limited by one fixing member, thereby enabling the battery cells located on both sides of the fixing member to share one fixing member. On the one hand, it can save the manufacturing cost of the battery and reduce the difficulty of assembling the battery. On the other hand, it can optimize the internal space of the battery to improve the internal space utilization of the battery.

[0019] In some embodiments, a snap-fitting portion is convexly provided on the first surface, and a snap-fitting groove is provided on the second surface.

[0020] In the above technical solution, by arranging the clamping portion on the first surface of the fixing member and correspondingly arranging the clamping slot on the second surface of the wall portion, the structure is simple and easy to manufacture, which helps to reduce the difficulty of assembling the battery.

[0021] In some embodiments, along the thickness direction of the wall portion, the wall portion has a third surface facing the electrode assembly, and a protrusion is formed on the third surface at a position corresponding to the slot.

[0022] In the above technical solution, a protrusion is formed on the third surface of the wall portion facing the electrode assembly and at a position corresponding to the slot, so that the slot on the second surface of the wall portion is a structure that can be formed by stamping, so as to form a slot and a protrusion on both sides of the wall portion respectively, which is conducive to reducing the difficulty of setting the slot on the second surface of the wall portion, thereby reducing the difficulty of manufacturing the battery cell and improving the production efficiency of the battery cell.

[0023] In some embodiments, along the thickness direction of the wall portion, the protrusion abuts against the electrode assembly, so that an exhaust channel is formed between the electrode assembly and the third surface.

[0024] In the above technical solution, by setting the protrusion to be able to abut the electrode assembly in the thickness direction of the wall, an exhaust channel can be formed between the electrode assembly and the third surface through the supporting effect of the protrusion, so that when the battery cell has thermal runaway, the internal exhaust smoothness of the battery cell can be improved to increase the pressure release rate of the battery cell, and further effectively reduce the risk of explosion or burst of the battery cell caused by untimely pressure release, so as to improve the reliability of battery use.

[0025] In some embodiments, the battery includes a plurality of battery cells stacked along a first direction, the first direction being perpendicular to the thickness direction of the wall; wherein, along the thickness direction of the wall, the plurality of battery cells all have a second surface, and the second surfaces of the plurality of battery cells are all arranged facing the first surface, and the card slots and the card connecting portions correspond one to one.

[0026] In the above technical solution, the battery is provided with a plurality of battery cells stacked along a first direction, the second surfaces of the plurality of battery cells are all arranged to face the first surface of the fixing member, and the card slots and the card connection parts are arranged in a one-to-one correspondence, so that the plurality of battery cells stacked along the first direction share one fixing member, and the plurality of battery cells are all fastened to one fixing member. The battery adopting such a structure can, on the one hand, save the manufacturing cost of the battery and reduce the difficulty of assembling the battery, and can optimize the internal space of the battery; on the other hand, when the battery cell expands along the first direction during use, the change in the spacing between two adjacent battery cells in the first direction can be reduced, so that the torque or pulling force of the confluence component connected between the two adjacent battery cells can be absorbed and distributed through the fixing member, thereby reducing the pulling phenomenon between the battery cell and the confluence component, which is beneficial to reducing the risk of electrical connection failure between the battery cells, so as to improve the stability and service life of the battery.

[0027] In some embodiments, along the first direction, the housing has two opposite fourth surfaces, the fourth surface is the surface with the largest area among the outer surfaces of the housing, and the fourth surface is perpendicular to the first direction.

[0028] In the above technical solution, the fourth surface with the largest area on the outer surface of the shell is set to a structure that is perpendicular to the first direction, so that multiple battery cells are stacked in the thickness direction of the battery cells. The battery cells can be constrained and restricted in the direction of greater expansion through the fixing parts, so as to alleviate the pulling phenomenon between the battery cells and the busbar components in the direction of the greatest expansion of the battery cells, which is beneficial to further reduce the risk of electrical connection failure between the battery cells.

[0029] In some embodiments, the battery also includes a box body, an assembly space is formed inside the box body, the battery cells and the fixings are both accommodated in the assembly space, and the fixings are connected to the box body; wherein the box body includes a first box body and a second box body arranged along a first direction, the first box body and the second box body cover each other and jointly define the assembly space.

[0030] In the above technical solution, by accommodating both the battery cell and the fixing part in the box, and connecting the fixing part and the box, the battery cell can be fastened in the box through the fixing part, so as to improve the stability and reliability of the battery cell being assembled in the box. In addition, by arranging the relative first box body and the second box body into a structure arranged along the first direction and covering each other, the arrangement direction of the first box body and the second box body is the same as the stacking direction of the plurality of battery cells, so that the plurality of battery cells stacked along the first direction can be a structure lying flat in the box, which is convenient for assembly and helps to reduce the difficulty of assembling the battery cell in the box, and on the other hand, the fixing part can constrain and limit the plurality of battery cells in the direction of greater expansion, so as to alleviate the pulling phenomenon between the battery cell and the confluence component in the direction of the maximum expansion of the battery cell.

[0031] In some embodiments, the battery includes a plurality of groups of battery cells arranged along the second direction, each group of battery cells includes a plurality of battery cells stacked along the first direction, and the thickness direction of the wall, the first direction, and the second direction are perpendicular to each other.

[0032] In the above technical solution, the battery is provided with a plurality of battery cells arranged along the second direction, and each group of battery cells includes a plurality of battery cells stacked along the first direction, so that while increasing the battery capacity, the plurality of battery cells arranged along the second direction can share a fixing member, and the plurality of battery cells of the plurality of battery cells are fastened to a fixing member. The battery adopting such a structure can, on the one hand, save the manufacturing cost of the battery and reduce the difficulty of assembling the battery, and can optimize the internal space of the battery; on the other hand, when the battery cell expands along the second direction during use, the change in the spacing between two adjacent battery cells in the second direction can be reduced, so that the torque or tension of the busbar component connected between the two adjacent groups of battery cells can be absorbed and distributed through the fixing member, thereby reducing the pulling phenomenon between the battery cell and the busbar component, which is beneficial to reducing the risk of electrical connection failure between the battery cells, so as to improve the stability and service life of the battery.

[0033] In some embodiments, the outer shell includes a shell and an end cover; the shell includes an integrally formed first wall and a second wall, the first wall is arranged around the second wall, along the thickness direction of the wall portion, one end of the first wall is connected to the second wall, and the other end is enclosed to form an opening, the first wall and the second wall jointly define a accommodating cavity for accommodating the electrode assembly; the end cover closes the opening; wherein the second wall is a wall portion.

[0034] In the above technical solution, by setting the wall portion of the outer shell as a second wall of the shell that is arranged opposite to the end cover in the thickness direction of the wall portion, the battery cell adopting this structure can make the wall portion with the card slot or the card connection portion formed away from the end cover, so that there is no direct connection relationship between the wall portion and the end cover, thereby alleviating the phenomenon that the stress generated when the shell and the end cover are assembled and connected to each other acts on the area of ​​the wall portion where the card slot or the card connection portion is provided, so as to reduce the risk of decreased structural strength of the area of ​​the wall portion where the card slot or the card connection portion is provided, and further improve the assembly reliability between the battery cell and the fixing part, so as to improve the reliability and service life of the battery.

[0035] In some embodiments, the housing includes a shell and an end cover; a receiving cavity with an opening is formed inside the shell, and the receiving cavity is used to receive the electrode assembly; the end cover closes the opening; wherein the end cover is a wall portion.

[0036] In the above technical solution, by setting the wall portion of the shell as the end cover of the shell for closing the opening of the shell, the battery cell adopting this structure is easy to process and form a slot or a snap-in portion on the wall portion, which is beneficial to reduce the difficulty of setting the slot or the snap-in portion on the wall portion, thereby reducing the difficulty of assembling the battery cell and improving the production efficiency of the battery cell.

[0037] In a second aspect, an embodiment of the present application further provides an electrical device, comprising the above-mentioned battery, wherein the battery is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

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

[0040] Figure 2 An exploded view of the structure of a battery provided in some embodiments of the present application;

[0041] Figure 3 A schematic diagram of assembling a battery cell and a fixing member provided in some embodiments of the present application;

[0042] Figure 4 A schematic diagram of the structure of a battery fixing member provided in some embodiments of the present application;

[0043] Figure 5 A schematic diagram of the structure of a battery cell provided in some embodiments of the present application;

[0044] Figure 6 A front view of a shell of a housing provided for some embodiments of the present application facing the second surface in a thickness direction of the wall portion;

[0045] Figure 7 An exploded view of the structure of a battery cell provided in some embodiments of the present application;

[0046] Figure 8 A cross-sectional view of a battery fixing member provided in some embodiments of the present application;

[0047] Fig. 9 A cross-sectional view of a battery cell provided for some embodiments of the present application;

[0048] Fig.10 A front view of a shell of a housing provided in some embodiments of the present application facing the third surface in the thickness direction of the wall portion;

[0049] Fig.11 A partial cross-sectional view of a shell of a housing provided for some embodiments of the present application.

[0050] Icons: 1000-vehicle; 100-battery; 10-fixing member; 11-first surface; 111-clamping portion; 112-pressure relief port; 12-exhaust chamber; 13-flow channel; 20-battery cell; 21-housing; 211-wall; 2111-second surface; 2111a-cage; 2112-third surface; 2112a-protrusion; 212-housing; 2121-accommodating chamber; 2122-opening; 213-end cover; 214-fourth surface; 22-electrode assembly; 221-ear; 23-electrode terminal; 24-current collecting member; 25-pressure relief mechanism; 26-exhaust channel; 30-box; 31-first box body; 32-second box body; 200-controller; 300-motor; X-thickness direction of the wall; Y-first direction; Z-second direction. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0052] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application 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 and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0053] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places 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.

[0054] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. 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 application generally indicates that the associated objects before and after are in an "or" relationship.

[0056] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0057] The term "plurality" used in the present application refers to two or more (including two).

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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 with a silver-plated surface, stainless steel with a silver-plated surface, 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 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.).

[0064] 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 can also be used. These positive electrode active materials can 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. Examples of lithium transition metal oxides may include, but are not limited to, lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi 1 / 3 Co 1 / 3 Mn 1 / 3O2 (also referred to as NCM 333 )、LiNi 0.5 Co 0.2 Mn 0.3 O2 (also referred to as NCM 523 )、LiNi 0.5 Co 0.25 Mn 0.25 O2 (also referred to as NCM 211 )、LiNi 0.6 Co 0.2 Mn 0.2 O2 (also referred to as NCM 622 )、LiNi 0.8 Co 0.1 Mn 0.1 O2 (also referred to as NCM 811 ), lithium nickel cobalt aluminum oxide (such as LiNi 0.85 Co 0.15 Al 0.05 O2) and its modified compounds, etc.

[0065] 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, etc. 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.

[0066] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0067] As an example, the negative electrode current collector may be a metal foil, a foamed metal or a composite current collector. For example, as the metal foil, aluminum or stainless steel treated with silver, stainless steel, copper, aluminum, nickel, carbon electrode, nickel or titanium, etc. may be used. The foamed metal may be a nickel foam, a copper foam, an aluminum foam, an alloy foam, etc. 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 (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.).

[0068] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0069] As an example, the negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material is disposed on either or both of the two facing surfaces of the negative electrode current collector.

[0070] As an example, the negative electrode active material may adopt the negative electrode active material for battery cells known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, etc. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0071] 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.

[0072] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0073] In some embodiments, the separator is a separator membrane. There may be many types of separator membranes, and any known porous separator membrane with good chemical stability and mechanical stability may be selected.

[0074] As an example, the material of the separator may include at least one of glass fiber, non-woven fabric, polyethylene, polypropylene and polyvinylidene fluoride. The separator may be a single-layer film or a multi-layer composite film. When the separator is a multi-layer composite film, the materials of each layer may be the same or different. The separator may be a separate component located between the positive and negative electrodes, or may be attached to the surface of the positive and negative electrodes.

[0075] 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.

[0076] In some embodiments, the battery cell further includes an electrolyte, which plays a role in conducting ions between the positive and negative electrodes. The electrolyte can be liquid, gel or solid. Among them, the liquid electrolyte includes an electrolyte salt and a solvent.

[0077] In some embodiments, the electrolyte salt may include at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bisfluorosulfonyl imide, lithium bistrifluoromethanesulfonyl imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalatoborate, lithium dioxalatoborate, lithium difluorodioxalatophosphate, and lithium tetrafluorooxalatophosphate.

[0078] In some embodiments, the solvent may include at least one of ethylene carbonate, propylene carbonate, ethyl methyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, cyclopentane, dimethyl sulfone, methyl ethyl sulfone and diethyl sulfone. The solvent may also be an ether solvent. The ether solvent may include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyltetrahydrofuran, diphenyl ether and crown ether.

[0079] Among them, the gel electrolyte includes a skeleton network with a polymer as the electrolyte, combined with an ionic liquid-lithium salt.

[0080] Among them, solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0081] As an example, the polymer solid electrolyte may be polyether (polyethylene oxide), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, a single ion polymer, polyionic liquid-lithium salt, cellulose, and the like.

[0082] As an example, the inorganic solid electrolyte may include an oxide solid electrolyte (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON film), a sulfide solid electrolyte (crystalline lithium superion conductor (lithium germanium phosphosulfide, silver germanium sulfide), amorphous sulfide) and one or more of a halide solid electrolyte, a nitride solid electrolyte and a hydride solid electrolyte.

[0083] As an example, the composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to a polymer solid electrolyte.

[0084] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0085] In some embodiments, the electrode assembly is a laminate structure.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0092] 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.

[0093] 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.

[0094] As an example, the battery cell may 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 but is not limited to a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc.

[0095] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.

[0096] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0097] 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.

[0098] 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.

[0099] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0100] Batteries have outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide adaptability, and low self-discharge coefficient. They are an important part of the development of new energy today. The development of battery technology must consider many design factors at the same time, such as performance parameters such as energy density, cycle life, discharge capacity, and charge and discharge rate. In addition, the stability of battery use must also be considered.

[0101] In battery technology, a battery generally includes a casing and a battery cell disposed in the casing. In order to increase the capacity and power of the battery, a plurality of battery cells arranged in a stacked manner are generally disposed in the battery casing. In related technologies, in order to improve the stability of the battery cell assembly in the casing, the battery cell is generally bonded to the inner surface of the casing by means of tape or adhesive layers. However, due to the complex use environment and working conditions of the battery, batteries of this structure may still experience shaking or movement of the battery cell in the casing during use, resulting in the risk of the battery cell being easily displaced or colliding with other components, thereby causing the battery cell to be easily damaged or having reduced reliability in use, which is not conducive to improving the stability and service life of the battery.

[0102] Based on the above considerations, in order to solve the problem of low stability and short service life of the battery, an embodiment of the present application provides a battery, the battery includes a fixing member and a battery cell. The fixing member has a first surface. The battery cell includes a housing and an electrode assembly, the electrode assembly is accommodated in the housing, the housing has a wall portion, the wall portion has a second surface facing away from the electrode assembly, and along the thickness direction of the wall portion, the second surface is arranged facing the first surface. One of the first surface and the second surface is provided with a card slot, and the other is provided with a card connection portion, and the card connection portion is plugged into and matched with the card slot.

[0103] In a battery of this structure, the fixing part of the battery cell has a first surface, and the wall part of the outer shell of the battery cell has a second surface, and the first surface and the second surface are arranged facing each other. By providing a slot on one of the first surface and the second surface and providing a snap-in portion on the other, the snap-in cooperation between the snap-in portion and the slot can fasten the battery cell to the fixing part, so as to fasten and limit the battery cell, thereby improving the structural stability and reliability of the battery cell when assembled into the battery, reducing the shaking or movement of the battery cell during use, and further effectively reducing the risk of displacement of the battery cell or collision with other components, so as to improve the stability and service life of the battery.

[0104] The battery disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships or aircraft. A power supply system comprising the battery disclosed in the present application can be used to form the electrical device, which is helpful to alleviate the problem of damage to the battery cells in the battery or reduced reliability during use, thereby improving the stability and service life of the battery.

[0105] The embodiment of the present application provides an electric device using a battery as a power source, 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, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0106] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0107] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for 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, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom of the vehicle 1000, or at the head of the vehicle 1000, or at the tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source or a power source for the vehicle 1000, etc. 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 the starting, navigation and working power requirements of the vehicle 1000 during driving.

[0108] In some embodiments of the present application, the battery 100 can not only serve as an operating power source or a use 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.

[0109] According to some embodiments of the present application, referring to Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , Figure 2 The structure explosion diagram of the battery 100 provided in some embodiments of the present application is shown in FIG. Figure 3 This is a schematic diagram of assembling a battery cell 20 and a fixing member 10 provided in some embodiments of the present application. Figure 4 This is a schematic diagram of the structure of the fixing member 10 of the box 30 provided in some embodiments of the present application. Figure 5 This is a schematic diagram of the structure of a battery cell 20 provided in some embodiments of the present application. Figure 6 A front view of a battery cell 20 provided in some embodiments of the present application facing the second surface 2111 in the thickness direction X of the wall. The present application provides a battery 100, which includes a fixing member 10 and a battery cell 20. The fixing member 10 has a first surface 11. The battery cell 20 includes a housing 21 and an electrode assembly 22, and the electrode assembly 22 is accommodated in the housing 21. The housing 21 has a wall 211, and the wall 211 has a second surface 2111 facing away from the electrode assembly 22. Along the thickness direction X of the wall, the second surface 2111 is arranged facing the first surface 11. One of the first surface 11 and the second surface 2111 is provided with a card slot 2111a, and the other is provided with a card connection portion 111, and the card connection portion 111 is plugged into and matched with the card slot 2111a.

[0110] The battery 100 may further include a box 30, which is used to provide an assembly space for the battery cell 20. The battery cell 20 and the fixing member 10 are both contained in the box 30, and the fixing member 10 is connected to the box 30. The box 30 may adopt a variety of structures. In some embodiments, the box 30 may include a first box body 31 and a second box body 32. The first box body 31 and the second box body 32 overlap each other along the first direction Y, and the first box body 31 and the second box body 32 jointly define an assembly space for accommodating the battery cell 20. The second box body 32 may be a hollow structure with one end open, and the first box body 31 may be a plate-like structure. The first box body 31 covers the open side of the second box body 32, so that the first box body 31 and the second box body 32 jointly define an assembly space; the first box body 31 and the second box body 32 may also be hollow structures with one side open, and the open side of the first box body 31 covers the open side of the second box body 32.

[0111] Of course, the box body 30 formed by the first box body 31 and the second box body 32 can be in various shapes, such as a cylinder, a cuboid or a cube. Figure 2 In the embodiment, the box body 30 is in the shape of a rectangular parallelepiped.

[0112] Optionally, in the battery 100, the battery cell 20 contained in the box 30 may be one or more. When there are more than one battery cell 20 disposed in the box 30, the multiple battery cells 20 may be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cells 20 is contained in the box 30.

[0113] For example, in Figure 2 and Figure 3 In the embodiment, the fixing member 10 is provided with a plurality of battery cells 20 arranged along the second direction Z on both sides of the wall thickness direction X, and each battery cell 20 comprises a plurality of battery cells 20 stacked along the first direction Y, see Figure 3 As shown, each group of battery cells 20 includes two battery cells 20 stacked along the first direction Y. Of course, in other embodiments, each group of battery cells 20 may also include three, four, five or six battery cells 20 stacked along the first direction Y.

[0114] Optionally, each battery cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be in a rectangular parallelepiped, a cylinder, a prism or other shapes. Figure 3 and Figure 5 In the embodiment, the battery cell 20 is a rectangular parallelepiped structure. Exemplarily, the thickness direction X of the wall portion is the height direction of the battery cell 20 , the first direction Y is the thickness direction of the battery cell 20 , and the second direction Z is the length direction of the battery cell 20 .

[0115] In some embodiments, the battery 100 may further include other structures. For example, the battery 100 may further include a busbar component, which is used to connect the plurality of battery cells 20 to achieve electrical connection between the plurality of battery cells 20 .

[0116] In the embodiment of the present application, the fixing member 10 is fixed in the box body 30 and plays the role of assembling and fixing the battery cell 20. The fixing member 10 is a structural beam inside the box body 30. For example, Figure 2 and Figure 3 In the embodiment, the fixing member 10 extends along the second direction Z, is accommodated in the box body 30 and is connected to the box body 30 .

[0117] The outer shell 21 of the battery cell 20 has a wall portion 211, and the second surface 2111 of the wall portion 211 on the side facing away from the electrode assembly 22 is arranged facing the first surface 11 of the fixing member 10 in the thickness direction X of the wall portion, that is, the fixing member 10 is located on one side of the battery cell 20 in the thickness direction X of the wall portion, and the fixing member 10 and the wall portion 211 are arranged opposite to each other, so that the surface of the fixing member 10 facing the wall portion 211 is the first surface 11.

[0118] One of the first surface 11 and the second surface 2111 is provided with a slot 2111a, and the other is provided with a snap-on portion 111. That is, the first surface 11 of the fixing member 10 may be provided with a slot 2111a, and correspondingly, the second surface 2111 of the wall portion 211 may be provided with a snap-on portion 111. Alternatively, the first surface 11 of the fixing member 10 may be provided with a snap-on portion 111, and correspondingly, the second surface 2111 of the wall portion 211 may be provided with a slot 2111a. Figure 4 In the embodiment, a clamping portion 111 is convexly provided on the first surface 11 of the fixing member 10, correspondingly, see Figure 6 As shown, a slot 2111 a is provided on the second surface 2111 of the wall portion 211 .

[0119] The clamping portion 111 is clamped and matched with the clamping slot 2111 a , that is, the clamping portion 111 is inserted into and clamped in the clamping slot 2111 a , so as to fasten the battery cell 20 to the fixing member 10 .

[0120] In the battery cell 20, the housing 21 can also be used to contain electrolytes, such as electrolytes. The housing 21 can be in various structural forms. The housing 21 can also be made of various materials, such as copper, iron, aluminum, steel, aluminum alloy, etc.

[0121] In some embodiments, reference Figure 5 and Figure 6 , and please refer to Figure 7 , Figure 7 The structure of the battery cell 20 provided in some embodiments of the present application is exploded. The housing 21 may include a shell 212 and an end cover 213. The shell 212 is formed with a receiving cavity 2121 inside, and the receiving cavity 2121 has an opening 2122, that is, the shell 212 is a hollow structure with one end open, and the end cover 213 covers the opening 2122 of the shell 212 and forms a sealed connection to form a sealed space for accommodating the electrode assembly 22 and the electrolyte.

[0122] Optionally, the shell 212 includes an integrally formed first wall and a second wall, the first wall is arranged around the second wall, one end of the first wall is connected to the second wall, and the other end is enclosed to form an opening 2122, and the end cover 213 covers the opening 2122 and is arranged opposite to the second wall.

[0123] It should be noted that the wall portion 211 having the second surface 2111 and disposed opposite to the fixing member 10 may be the end cover 213, or may be one of the multiple walls of the housing 212. Figure 3 and Figure 5In the embodiment, the wall portion 211 is a second wall of the shell 212 arranged opposite to the end cover 213 in the thickness direction X of the wall portion, that is, the thickness direction X of the wall portion is the arrangement direction of the end cover 213 and the second wall, and is also the thickness direction of the end cover 213. Of course, in other embodiments, the wall portion 211 can also be the end cover 213 of the shell 21, or it can be the first wall of the shell 212 and the end cover 213 that are adjacent to and abut against each other.

[0124] When assembling the battery cell 20 , the electrode assembly 22 may be placed in the housing 212 first, and the housing 212 may be filled with electrolyte. The end cap 213 may then be placed on the opening 2122 of the housing 212 to seal the opening 2122 of the housing 212 .

[0125] The shell 212 can be in various shapes, such as a cylinder, a cuboid, etc. The shape of the shell 212 can be determined according to the specific shape of the electrode assembly 22. For example, if the electrode assembly 22 is a cylindrical structure, the shell 212 can be a cylindrical structure; if the electrode assembly 22 is a cuboid structure, the shell 212 can be a cuboid structure. Of course, the end cap 213 can also be in various structures, such as a plate-like structure or a hollow structure with one end open. For example, in Figure 5 In the embodiment, the housing 212 is a rectangular parallelepiped structure.

[0126] It is understandable that the outer shell 21 is not limited to the above structure, and the outer shell 21 may also be other structures. For example, the outer shell 21 includes a shell body 212 and two end caps 213. The shell body 212 is a hollow structure with openings 2122 on opposite sides. One end cap 213 corresponds to an opening 2122 of the shell body 212 and forms a sealed connection to form a sealed space for accommodating the electrode assembly 22 and the electrolyte.

[0127] The electrode assembly 22 is a component in the battery cell 20 where electrochemical reactions occur. The structure of the electrode assembly 22 can be of various types. For example, the electrode assembly 22 can be a wound structure formed by winding a positive electrode sheet, an isolation member, and a negative electrode sheet, or a stacked structure formed by stacking a positive electrode sheet, an isolation member, and a negative electrode sheet.

[0128] Exemplarily, the isolation member is an isolation membrane, and a main material of the isolation membrane may be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene and polyvinylidene fluoride.

[0129] Among them, a pole ear 221 is formed at one end of the electrode assembly 22, and the pole ear 221 is used to input or output the positive electrode or negative electrode of the electrode assembly 22. It should be noted that the pole ear 221 of the electrode assembly 22 is a component formed by the regions on the positive electrode sheet that are not coated with the positive electrode active material layer being stacked and connected to each other, or a component formed by the regions on the negative electrode sheet that are not coated with the negative electrode active material layer being stacked and connected to each other. If the pole ear 221 is used to output the positive electrode of the electrode assembly 22, the pole ear 221 is a component formed by the regions on the positive electrode sheet that are not coated with the positive electrode active material layer being stacked and connected to each other; if the pole ear 221 is used to output the negative electrode of the electrode assembly 22, the pole ear 221 is a component formed by the regions on the negative electrode sheet that are not coated with the negative electrode active material layer being stacked and connected to each other.

[0130] Optionally, the number of electrode assemblies 22 contained in the housing 21 may be one or more. Figure 7 In the embodiment, the outer shell 21 of the battery cell 20 is provided with two electrode assemblies 22, and the two electrode assemblies 22 are stacked along the first direction Y, that is, the two electrode assemblies 22 are stacked along the thickness direction of the battery cell 20. Of course, in other embodiments, the electrode assemblies 22 accommodated in the outer shell 21 can be one, three, four, five, six, seven or eight, etc.

[0131] In some embodiments, see Figure 5 and Figure 7 As shown, the battery cell 20 may also include an electrode terminal 23, which is arranged on the outer shell 21, and the electrode terminal 23 is connected to the pole ear 221 of the electrode assembly 22 to electrically connect the electrode terminal 23 and the electrode assembly 22, wherein the electrode terminal 23 plays a role in outputting or inputting electric energy of the battery cell 20, one end of the electrode terminal 23 is used to be connected to the pole ear 221 of the electrode assembly 22, and the other end is used to be connected to the busbar component of the battery 100 to realize the input or output of electric energy of the battery cell 20.

[0132] It should be noted that the electrode terminal 23 is insulated and mounted on the housing 21 , that is, no electrical connection is formed between the electrode terminal 23 and the housing 21 .

[0133] Exemplarily, the electrode terminal 23 is disposed on the end cover 213 of the housing 21. Of course, in other embodiments, the electrode terminal 23 may also be disposed on the shell 212 of the housing 21. Figure 3 and Figure 5 As shown, in the embodiment where the wall portion 211 is a second wall disposed opposite to the housing 212 and the end cover 213 , the electrode terminal 23 is disposed at an end of the housing 21 away from the fixing member 10 in the thickness direction X of the wall portion.

[0134] Among them, Figure 5 and Figure 7In the embodiment, the battery cell 20 includes two electrode terminals 23, both of which are arranged on the end cap 213, and the two electrode terminals 23 are arranged at intervals along the second direction Z. Correspondingly, each electrode assembly 22 has two pole ears 221, the two pole ears 221 are arranged at intervals along the second direction Z, and the polarities of the two pole ears 221 are opposite. The two electrode terminals 23 are electrically connected to the two pole ears 221 of the electrode assembly 22, respectively, to realize the input or output of the electric energy of the battery cell 20. Exemplarily, the material of the electrode terminal 23 can also be multiple, for example, the material of the electrode terminal 23 can be copper, iron, aluminum, steel or aluminum alloy.

[0135] In some embodiments, see Figure 7 As shown, the battery cell 20 may also include two current collecting components 24, both of which are arranged in the shell 21, and the two current collecting components 24 are arranged at intervals along the second direction Z, and each current collecting component 24 is used to connect an electrode terminal 23 and a plurality of electrode assemblies 22 with the same polarity of the pole lugs 221 to achieve electrical connection between the electrode terminal 23 and the electrode assembly 22, which is beneficial to reduce the difficulty of assembly between the pole lug 221 and the electrode terminal 23.

[0136] Exemplarily, the material of the current collecting component 24 may be various, for example, the material of the current collecting component 24 may be copper, iron, aluminum, steel or aluminum alloy.

[0137] In some embodiments, see Figure 6 As shown, the battery cell 20 may further include a pressure relief mechanism 25 , which is disposed on the housing 21 and is used to release the pressure inside the battery cell 20 when the internal pressure or temperature of the battery cell 20 reaches a predetermined value.

[0138] Optionally, the pressure relief mechanism 25 may be disposed on the end cover 213 of the housing 21, or may be disposed on the shell 212 of the housing 21. Figure 6 In the embodiment, the pressure relief mechanism 25 is disposed on the wall portion 211 .

[0139] Similarly, the pressure relief mechanism 25 and the housing 21 may be an integrally formed structure or a separately set structure. If the pressure relief mechanism 25 and the housing 21 are a separate structure, the pressure relief mechanism 25 may be connected to the housing 21 by welding or the like, and correspondingly, the pressure relief mechanism 25 may be a pressure relief component such as an explosion-proof valve, an explosion-proof disk, an air valve, a pressure relief valve or a safety valve; if the pressure relief mechanism 25 and the housing 21 are an integrally formed structure, the pressure relief mechanism 25 is an area on the housing 21 where a weak structure is formed, for example, an area on the housing 21 where a notch groove is set.

[0140] In this embodiment, the fixing member 10 of the battery cell 20 has a first surface 11, and the wall portion 211 of the outer shell 21 of the battery cell 20 has a second surface 2111. The first surface 11 and the second surface 2111 are arranged facing each other. By providing a card slot 2111a on one of the first surface 11 and the second surface 2111, and providing a card connection portion 111 on the other, the card connection portion 111 and the card slot 2111a can be engaged with each other to fasten the battery cell 20 to the fixing member 10, so as to fasten and limit the battery cell 20, thereby improving the structural stability and reliability of the battery cell 20 when assembled into the battery 100, reducing the shaking or movement of the battery cell 20 during use, and further effectively reducing the risk of displacement of the battery cell 20 or collision with other components, so as to improve the stability and service life of the battery 100.

[0141] According to some embodiments of the present application, Figure 3 , Figure 4 and Figure 6 As shown, the first surface 11 abuts against the second surface 2111. That is, the wall portion 211 of the battery cell 20 abuts against the first surface 11 of the fixing member 10 in the thickness direction X of the wall portion.

[0142] In this embodiment, by making the second surface 2111 of the wall portion 211 and the first surface 11 of the fixing member 10 abut against each other, the wall portion 211 is a structure that abuts against the fixing member 10, thereby further improving the assembly stability between the battery cell 20 and the fixing member 10, and improving the effect of the mutual plug-in cooperation between the clamping portion 111 and the clamping groove 2111a. In addition, by setting the second surface 2111 of the wall portion 211 and the first surface 11 of the fixing member 10 to a structure that abuts against each other, the size of the gap between the battery cell 20 and the fixing member 10 can be reduced, thereby saving the space jointly occupied by the battery cell 20 and the fixing member 10 in the thickness direction X of the wall portion, which is beneficial to improving the internal space utilization rate of the battery 100.

[0143] According to some embodiments of the present application, see Figure 4 and Figure 6 As shown, one of the first surface 11 and the second surface 2111 is provided with a plurality of slots 2111 a, and the other is provided with a plurality of engaging portions 111 , and each engaging portion 111 is plug-fitted with a slot 2111 a.

[0144] Among them, one of the first surface 11 and the second surface 2111 is provided with a plurality of card grooves 2111a, and the other is provided with a plurality of card connection parts 111, that is, a plurality of card grooves 2111a are provided on the second surface 2111 of the wall portion 211 of the outer shell 21 of each battery cell 20, and a plurality of card connection parts 111 are provided on the first surface 11 of the fixing member 10 corresponding to each battery cell 20, or a plurality of card connection parts 111 are provided on the second surface 2111 of the wall portion 211 of the outer shell 21 of each battery cell 20, and a plurality of card grooves 2111a are provided on the first surface 11 of the fixing member 10 corresponding to each battery cell 20.

[0145] Each clamping portion 111 is plugged into and matched with a clamping slot 2111 a , that is, the clamping portion 111 and the clamping slot 2111 a are arranged in a one-to-one correspondence.

[0146] For example, in Figure 4 In the embodiment, four clamping portions 111 are provided in the area where the first surface 11 of the fixing member 10 and the second surface 2111 of each battery cell 20 are arranged opposite to each other. Figure 6 In the embodiment, four slots 2111 a are disposed on the second surface 2111 of each battery cell 20 , and each slot 2111 a is for a clamping portion 111 to be clamped into.

[0147] In this embodiment, a plurality of card slots 2111a are provided on one of the first surface 11 of the fixing member 10 and the second surface 2111 of the wall portion 211, and a plurality of card connecting portions 111 are provided on the other, and each card connecting portion 111 can be plugged and matched with a card slot 2111a, so that the battery cell 20 is a structure in which the plurality of card connecting portions 111 and the plurality of card slots 2111a can cooperate with each other to be fastened to the fixing member 10, thereby facilitating further improving the effect of fastening and limiting the battery cell 20, further reducing the shaking or movement of the battery cell 20 during use, and further reducing the risk of displacement of the battery cell 20 or collision with other components, so as to improve the stability and service life of the battery 100.

[0148] According to some embodiments of the present application, referring to Figure 3 , Figure 4 and Figure 6 , and please refer to Figure 8 and Fig. 9 , Figure 8 A cross-sectional view of a fixing member 10 of a battery 100 provided in some embodiments of the present application, Fig. 9A cross-sectional view of a battery cell 20 provided in some embodiments of the present application. The battery cell 20 may further include a pressure relief mechanism 25, which is disposed on the wall portion 211 and is configured to release the internal pressure of the battery cell 20. An exhaust cavity 12 is formed inside the fixing member 10, and a pressure relief port 112 is disposed on the first surface 11, the pressure relief port 112 is connected to the exhaust cavity 12, and the pressure relief mechanism 25 and the pressure relief port 112 are disposed opposite to each other along the thickness direction X of the wall portion.

[0149] The pressure relief mechanism 25 is configured to release the internal pressure of the battery cell 20 , that is, the pressure relief mechanism 25 is used to release the pressure inside the battery cell 20 when the internal pressure or temperature of the battery cell 20 reaches a predetermined value.

[0150] exist Figure 4 and Figure 8 In the embodiment, the fixing member 10 is a structure extending along the second direction Z, and the exhaust cavity 12 passes through both ends of the fixing member 10 along the second direction Z, so as to discharge the gas in the exhaust cavity 12 out of the box body 30.

[0151] A pressure relief port 112 is provided on the first surface 11, and the pressure relief port 112 is communicated with the exhaust cavity 12. That is to say, a pressure relief port 112 is provided on the fixing member 10, and two ends of the pressure relief port 112 in the thickness direction X of the wall portion respectively penetrate the first surface 11 and the cavity wall surface of the exhaust cavity 12, so that the pressure relief port 112 is formed on the first surface 11 and communicated with the exhaust cavity 12.

[0152] Along the thickness direction X of the wall, the pressure relief mechanism 25 is arranged opposite to the pressure relief port 112, that is, the pressure relief mechanism 25 is arranged facing the pressure relief port 112 in the thickness direction X of the wall, that is, at least part of the projection of the pressure relief mechanism 25 in the thickness direction X of the wall is located in the pressure relief port 112, so that the gas released by the pressure relief mechanism 25 can enter the exhaust chamber 12 through the pressure relief port 112.

[0153] In this embodiment, the interior of the fixing member 10 is further provided with an exhaust cavity 12, and the first surface 11 of the fixing member 10 is provided with a pressure relief port 112 which is interconnected with the exhaust cavity 12. By setting the pressure relief mechanism 25 of the battery cell 20 to be arranged opposite to the pressure relief port 112 in the thickness direction X of the wall, when the battery cell 20 has thermal runaway, the gas released by the pressure relief mechanism 25 can directly enter the exhaust cavity 12 through the pressure relief port 112, and further be discharged through the exhaust cavity 12. The battery 100 with such a structure is On the one hand, there is no need to separately set an exhaust component for the pressure relief mechanism 25 arranged on the wall 211, which is conducive to reducing the difficulty of assembling the battery 100 and the manufacturing cost of the battery 100. On the other hand, it can improve the exhaust smoothness of the pressure relief mechanism 25 arranged on the wall 211, which is conducive to alleviating the phenomenon that the pressure relief mechanism 25 is blocked or blocked by the fixing member 10, so as to improve the pressure relief rate of the battery cell 20, thereby reducing the risk of explosion or bursting of the battery cell 20 caused by untimely pressure relief, so as to improve the reliability of the battery 100. In addition, in the structure in which the battery cell 20 and the fixing member 10 are mutually engaged and assembled through the engaging portion 111 and the engaging groove 2111a, it is also possible to alleviate the phenomenon that the battery cell 20 moves when the pressure relief mechanism 25 releases pressure, so as to reduce the risk that the pressure relief mechanism 25 is misaligned with the pressure relief port 112 due to the movement of the battery cell 20, thereby improving the stability and reliability of the pressure relief of the battery cell 20 during thermal runaway.

[0154] In some embodiments, along the wall thickness direction X, the projection of the pressure relief mechanism 25 is located inside the pressure relief port 112. That is, in a plane perpendicular to the wall thickness direction X, the orthographic projection of the wall surface of the pressure relief port 112 surrounds the outside of the orthographic projection of the pressure relief mechanism 25.

[0155] In this embodiment, by setting the projection of the pressure relief mechanism 25 in the thickness direction X of the wall to be located within the pressure relief port 112, the pressure relief port 112 can receive the gas released from any position of the pressure relief mechanism 25, thereby further improving the exhaust smoothness of the pressure relief mechanism 25 arranged on the wall 211, thereby further improving the pressure relief rate of the battery cell 20.

[0156] According to some embodiments of the present application, see Figure 8 As shown, a flow channel 13 may be formed inside the fixing member 10 . The flow channel 13 is used to accommodate a heat exchange medium. The heat exchange medium is configured to perform heat exchange with the battery cell 20 .

[0157] In the embodiment where the exhaust cavity 12 is formed inside the fixing member 10 , the flow channel 13 formed inside the fixing member 10 is not connected to the exhaust cavity 12 , that is, the flow channel 13 is formed in the cavity wall of the exhaust cavity 12 .

[0158] The flow channel 13 is used to accommodate a heat exchange medium, and the heat exchange medium is configured to exchange heat with the battery cell 20 , that is, the heat exchange medium can exchange heat with the battery cell 20 through the fixing member 10 to manage the temperature of the battery cell 20 .

[0159] Exemplarily, the heat exchange medium may be a gas, such as air or hydrogen, and the fluid medium may be a liquid, such as water, a salt water solution or liquid nitrogen.

[0160] In the present embodiment, a flow channel 13 is further provided inside the fixing member 10 so that the flow channel 13 of the fixing member 10 can accommodate a heat exchange medium for heat exchange with the battery cell 20, so that the fixing member 10 can also play a role in managing the temperature of the battery cell 20. The battery 100 adopting such a structure can, on the one hand, integrate a thermal management component for managing the temperature of the battery cell 20 into the fixing member 10, which is beneficial to reducing the difficulty of assembling the battery 100 and the manufacturing cost of the battery 100. On the other hand, in the structure in which the battery cell 20 and the fixing member 10 are mutually engaged and assembled through the engaging portion 111 and the engaging groove 2111a, the contact area between the battery cell 20 and the fixing member 10 can be increased, thereby increasing the heat exchange area between the battery cell 20 and the fixing member 10, so as to enhance the effect of the fixing member 10 in managing the temperature of the battery cell 20.

[0161] According to some embodiments of the present application, see Figure 3 , Figure 4 and Figure 8 As shown, along the thickness direction X of the wall portion, both sides of the fixing member 10 have a first surface 11, and both sides of the fixing member 10 are provided with battery cells 20, and the second surfaces 2111 of the battery cells 20 located on both sides of the fixing member 10 are arranged facing each other. That is to say, in the thickness direction X of the wall portion, both sides of the fixing member 10 are provided with battery cells 20, and the second surfaces 2111 of the battery cells 20 located on both sides of the fixing member 10 are arranged facing each other, so that the second surfaces 2111 of the battery cells 20 located on both sides of the fixing member 10 are respectively arranged facing the two first surfaces 11 on both sides of the fixing member 10.

[0162] In the present embodiment, the fixing member 10 has a first surface 11 on both sides in the thickness direction X of the wall portion, so that the battery cells 20 can be arranged on both sides of the fixing member 10, so that the battery cells 20 located on both sides of the fixing member 10 can be fixed and limited by one fixing member 10, thereby enabling the battery cells 20 located on both sides of the fixing member 10 to share one fixing member 10. On the one hand, it can save the manufacturing cost of the battery 100 and reduce the difficulty of assembling the battery 100. On the other hand, it can optimize the internal space of the battery 100 to improve the internal space utilization of the battery 100.

[0163] According to some embodiments of the present application, see Figure 4 and Figure 6 As shown, the first surface 11 is provided with a snap-fitting portion 111 convexly, and the second surface 2111 is provided with a snap-fitting groove 2111 a .

[0164] In this embodiment, by setting the clamping portion 111 on the first surface 11 of the fixing member 10 and correspondingly setting the clamping slot 2111a on the second surface 2111 of the wall portion 211, the structure is simple and easy to manufacture, which helps to reduce the difficulty of assembling the battery 100.

[0165] In some embodiments, reference Figure 6 and Fig. 9 , and please refer to Fig.10 and Fig.11 , Fig.10 A front view of the shell 212 of the housing 21 provided in some embodiments of the present application facing the third surface 2112 in the thickness direction X of the wall portion, Fig.11 A partial cross-sectional view of the shell 212 of the housing 21 provided in some embodiments of the present application. Along the thickness direction X of the wall portion, the wall portion 211 has a third surface 2112 facing the electrode assembly 22, and a protrusion 2112a is formed on the third surface 2112 at a position corresponding to the slot 2111a.

[0166] Among them, the slots 2111a and the protrusions 2112a are structures that correspond one to one in the thickness direction X of the wall portion, that is, a protrusion 2112a is formed at the position of each slot 2111a on the third surface 2112. It should be noted that in an embodiment in which a plurality of slots 2111a are formed on the second surface 2111, a plurality of protrusions 2112a are also correspondingly formed on the third surface 2112, and the positions of the protrusions 2112a and the slots 2111a are opposite and the number is the same.

[0167] Exemplarily, the slot 2111a provided on the second surface 2111 of the wall portion 211 away from the electrode assembly 22 is formed by a stamping process, so as to form the slot 2111a on the second surface 2111 of the wall portion 211 away from the electrode assembly 22, and form a protrusion 2112a on the third surface 2112 of the wall portion 211 facing the electrode assembly 22 and at a position corresponding to the slot 2111a. Of course, the processing method of the slot 2111a provided on the second surface 2111 of the wall portion 211 away from the electrode assembly 22 is not limited thereto. In other embodiments, the slot 2111a provided on the second surface 2111 of the wall portion 211 away from the electrode assembly 22 can also be formed by a processing process such as casting or milling.

[0168] In this embodiment, a protrusion 2112a is formed on the third surface 2112 of the wall portion 211 facing the electrode assembly 22 and at a position corresponding to the slot 2111a, so that the slot 2111a on the second surface 2111 of the wall portion 211 is a structure that can be formed by stamping, so that the slot 2111a and the protrusion 2112a are respectively formed on both sides of the wall portion 211, which helps to reduce the difficulty of setting the slot 2111a on the second surface 2111 of the wall portion 211, thereby reducing the difficulty of manufacturing the battery cell 20 and improving the production efficiency of the battery cell 20.

[0169] In some embodiments, see Fig. 9 As shown, along the thickness direction X of the wall portion, the protrusion 2112 a abuts against the electrode assembly 22 , so that an exhaust channel 26 is formed between the electrode assembly 22 and the third surface 2112 .

[0170] Among them, the protrusion 2112a abuts against the electrode assembly 22 to form an exhaust channel 26 between the electrode assembly 22 and the third surface 2112. That is to say, the protrusion 2112a plays a supporting and separating role on the third surface 2112 and the electrode assembly 22, so that the electrode assembly 22 and the wall portion 211 can be arranged at intervals in the thickness direction X of the wall portion, so that an exhaust gap is formed between the electrode assembly 22 and the third surface 2112 of the wall portion 211, and the exhaust gap is the exhaust channel 26 formed between the electrode assembly 22 and the third surface 2112 of the wall portion 211.

[0171] It should be noted that in an embodiment in which a pressure relief mechanism 25 is also provided on the wall portion 211, the exhaust channel 26 is configured to guide the gas inside the outer shell 21 to the pressure relief mechanism 25. That is to say, when the pressure relief mechanism 25 opens the valve and releases the internal pressure of the battery cell 20, the exhaust channel 26 can be connected to the outside of the outer shell 21 through the pressure relief mechanism 25, so that the gas inside the outer shell 21 can be discharged to the outside of the outer shell 21 after passing through the exhaust channel 26 and the pressure relief mechanism 25 in sequence.

[0172] In this embodiment, the protrusion 2112a is set to be able to provide abutment for the electrode assembly 22 in the thickness direction X of the wall, so that the exhaust channel 26 can be formed between the electrode assembly 22 and the third surface 2112 through the supporting effect of the protrusion 2112a, thereby improving the internal exhaust smoothness of the battery cell 20 when thermal runaway occurs in the battery cell 20, thereby increasing the pressure release rate of the battery cell 20, and further effectively reducing the risk of explosion or bursting of the battery cell 20 caused by untimely pressure release, thereby improving the reliability of the battery 100.

[0173] According to some embodiments of the present application, see Figure 3 , Figure 4 and Figure 6As shown, the battery 100 includes a plurality of battery cells 20 stacked along a first direction Y, and the first direction Y is perpendicular to the thickness direction X of the wall. Along the thickness direction X of the wall, the plurality of battery cells 20 all have a second surface 2111, and the second surfaces 2111 of the plurality of battery cells 20 are all arranged facing the first surface 11, and the card slots 2111a and the card connection portions 111 correspond one to one.

[0174] Among them, the second surfaces 2111 of the multiple battery cells 20 are all arranged to face the first surface 11, that is, the second surfaces 2111 of the multiple battery cells 20 stacked along the first direction Y are all arranged to face the first surface 11 of the fixing member 10, so that the pressure relief mechanisms 25 of the multiple battery cells 20 stacked along the first direction Y are all arranged to face the first surface 11 of the fixing member 10.

[0175] The card slot 2111a and the card connecting portion 111 correspond one to one, that is, the first surface 11 of the fixing member 10 is provided with a card connecting portion 111 in an area corresponding to each battery cell 20 stacked along the first direction Y, and correspondingly, the second surface 2111 of the wall portion 211 of the outer shell 21 of the battery cell 20 is provided with a card slot 2111a, so that the multiple battery cells 20 stacked along the first direction Y can all be carded and fixed on one fixing member 10, or, the first surface 11 of the fixing member 10 is provided with a card slot 2111a in an area corresponding to each battery cell 20 stacked along the first direction Y, and correspondingly, the second surface 2111 of the wall portion 211 of the outer shell 21 of the battery cell 20 is provided with a card connecting portion 111, so that the multiple battery cells 20 stacked along the first direction Y can all be carded and fixed on one fixing member 10.

[0176] For example, in Figure 3 In the figure, the battery 100 includes a plurality of groups of battery cells 20 arranged along a second direction Z, each group of battery cells 20 includes a plurality of battery cells 20 stacked along a first direction Y, and in the thickness direction X of the wall portion, a plurality of groups of battery cells 20 are arranged on both sides of the fixing member 10, and correspondingly, a first surface 11 of the fixing member 10 is arranged to face the second surfaces 2111 of the plurality of battery cells 20 located on one side of the fixing member 10, and another first surface 11 of the fixing member 10 is arranged to face the second surfaces 2111 of the plurality of battery cells 20 located on the other side of the fixing member 10.

[0177] For example, in Figure 3 In the embodiment, each group of battery cells 20 includes two battery cells 20 stacked along the first direction Y. Of course, in other embodiments, each group of battery cells 20 may also include three, four, five or six battery cells 20 stacked along the first direction Y.

[0178] In the present embodiment, the battery 100 is provided with a plurality of battery cells 20 stacked along a first direction Y, the second surfaces 2111 of the plurality of battery cells 20 are all arranged to face the first surface 11 of the fixing member 10, and the card slots 2111a and the card connection portions 111 are arranged one by one, so that the plurality of battery cells 20 stacked along the first direction Y share one fixing member 10, and the plurality of battery cells 20 are all fastened to one fixing member 10. The battery 100 adopting such a structure can save the manufacturing cost of the battery 100 and reduce the difficulty of assembling the battery 100, and can optimize the internal space of the battery 100. On the other hand, when the battery cell 20 expands along the first direction Y during use, the change in the spacing between two adjacent battery cells 20 in the first direction Y can be reduced, so that the torque or tension of the confluence component connected between the two adjacent battery cells 20 can be absorbed and distributed by the fixing member 10, thereby reducing the pulling phenomenon between the battery cell 20 and the confluence component, which is beneficial to reducing the risk of electrical connection failure between the battery cells 20, so as to improve the use stability and service life of the battery 100.

[0179] In some embodiments, see Figure 3 , Figure 5 and Fig.11 As shown, along the first direction Y, the housing 21 has two opposite fourth surfaces 214 , the fourth surface 214 is the surface with the largest area among the outer surfaces of the housing 21 , and the fourth surface 214 is perpendicular to the first direction Y.

[0180] The housing 21 has two opposite fourth surfaces 214 , which are the surfaces with the largest area among the outer surfaces of the housing 21 . That is, the two fourth surfaces 214 are the outer surfaces of the housing 21 on both sides in the thickness direction of the battery cell 20 .

[0181] The fourth surface 214 is perpendicular to the first direction Y. That is, among the plurality of battery cells 20 stacked along the first direction Y, the fourth surfaces 214 between two adjacent battery cells 20 are arranged in the first direction Y facing each other and abutting against each other.

[0182] In this embodiment, the fourth surface 214 with the largest area on the outer surface of the shell 21 is set to a structure that is perpendicular to the first direction Y, so that the multiple battery cells 20 are stacked in the thickness direction of the battery cells 20, so that the battery cells 20 can be constrained and restricted in the direction of greater expansion through the fixing member 10, so as to alleviate the pulling phenomenon between the battery cells 20 and the busbar component in the direction of the greatest expansion of the battery cells 20, which is beneficial to further reduce the risk of electrical connection failure between the battery cells 20.

[0183] According to some embodiments of the present application, see Figure 2As shown, the battery 100 further includes a box body 30, an assembly space is formed inside the box body 30, the battery cell 20 and the fixing member 10 are both accommodated in the assembly space, and the fixing member 10 is connected to the box body 30. The box body 30 includes a first box body 31 and a second box body 32 arranged along the first direction Y, and the first box body 31 and the second box body 32 cover each other and jointly define the assembly space.

[0184] It should be noted that, in some embodiments, the battery 100 may not be provided with the box 30, and the battery 100 including the fixing member 10 and the battery cell 20 may be directly assembled and assembled to the electrical device, and correspondingly, the fixing member 10 is fixed to the electrical device, thereby providing electrical energy to the electrical device. In other words, the box 30 may be used as a part of the electrical device. Taking the vehicle 1000 as an example of the electrical device, the box 30 may be used as a part of the chassis structure of the vehicle 1000, for example, a part of the box 30 may become at least a part of the floor of the vehicle 1000, or a part of the box 30 may become at least a part of the crossbeam and longitudinal beam of the vehicle 1000.

[0185] In this embodiment, the battery cell 20 and the fixing member 10 are both contained in the box body 30, and the fixing member 10 is connected to the box body 30, so that the battery cell 20 can be fastened in the box body 30 through the fixing member 10, so as to improve the stability and reliability of the battery cell 20 being assembled into the box body 30. In addition, by setting the relative first box body 31 and the second box body 32 to be arranged along the first direction Y and covering each other, the arrangement direction of the first box body 31 and the second box body 32 is the same as the stacking direction of the plurality of battery cells 20, so that the plurality of battery cells 20 stacked along the first direction Y can be a structure lying in the box body 30, which is convenient for assembly and helps to reduce the difficulty of assembling the battery cell 20 in the box body 30, and on the other hand, the fixing member 10 can constrain and limit the plurality of battery cells 20 in the direction of greater expansion, so as to alleviate the pulling phenomenon between the battery cell 20 and the confluence component in the direction of the maximum expansion of the battery cell 20.

[0186] In some embodiments, see Figure 2 , Figure 3 and Figure 4 As shown, the battery 100 may include multiple groups of battery cells 20 arranged along the second direction Z, each group of battery cells 20 includes multiple battery cells 20 stacked along the first direction Y, and the thickness direction X of the wall, the first direction Y and the second direction Z are perpendicular to each other.

[0187] Among them, the fixing member 10 is a plate-like structure extending along the second direction Z, and multiple groups of battery cells 20 arranged along the second direction Z are provided on both sides of the fixing member 10 in the thickness direction X of the wall portion, so that the multiple groups of battery cells 20 located on both sides of the fixing member 10 share one fixing member 10.

[0188] In the present embodiment, the battery 100 is provided with a plurality of battery cells 20 arranged along the second direction Z, and each group of battery cells 20 includes a plurality of battery cells 20 stacked along the first direction Y, so that while improving the capacity of the battery 100, the plurality of battery cells 20 arranged along the second direction Z can share a fixing member 10, and the plurality of battery cells 20 of the plurality of battery cells 20 are fastened to the fixing member 10. The battery 100 adopting such a structure can save the manufacturing cost of the battery 100 and reduce the difficulty of assembling the battery 100, and can optimize the internal space of the battery 100. On the other hand, when the battery cells 20 expand along the second direction Z during use, the change in the spacing between two adjacent battery cells 20 in the second direction Z can be reduced, so that the torque or tension of the busbar connected between the two adjacent groups of battery cells 20 can be absorbed and distributed through the fixing member 10, so that the pulling phenomenon between the battery cells 20 and the busbar can be reduced, which is beneficial to reduce the risk of electrical connection failure between the battery cells 20, so as to improve the use stability and service life of the battery 100.

[0189] According to some embodiments of the present application, see Figure 5 and Figure 7 As shown, the shell 21 may include a shell 212 and an end cover 213. The shell 212 includes an integrally formed first wall and a second wall. The first wall is arranged around the second wall. Along the thickness direction X of the wall portion, one end of the first wall is connected to the second wall, and the other end is enclosed to form an opening 2122. The first wall and the second wall jointly define a accommodating cavity 2121 for accommodating the electrode assembly 22. The end cover 213 closes the opening 2122, and the second wall is the wall portion 211.

[0190] The shell 212 includes an integrally formed first wall and a second wall, that is, the shell 212 is manufactured by an integral molding process, such as an integral molding process such as stamping, casting or extrusion molding, that is, the first wall and the second wall of the shell 212 are an integral structure.

[0191] The second wall is the wall portion 211, that is, the wall portion 211 is a wall of the shell 212 arranged opposite to the end cover 213 in the thickness direction X of the wall portion. Correspondingly, the surface of the second wall of the shell 212 facing away from the electrode assembly 22 is the second surface 2111, and the second wall of the shell 212 and the first surface 11 of the fixing member 10 are arranged facing each other in the thickness direction X of the wall portion.

[0192] In the present embodiment, by setting the wall portion 211 of the outer shell 21 as a second wall of the shell 212 which is arranged opposite to the end cover 213 in the thickness direction X of the wall portion, the battery cell 20 adopting such a structure can make the wall portion 211 formed with the card slot 2111a or the card connection portion 111 away from the end cover 213, so that there is no direct connection relationship between the wall portion 211 and the end cover 213, thereby alleviating the phenomenon that the stress generated when the shell 212 and the end cover 213 are assembled and connected to each other acts on the area of ​​the wall portion 211 where the card slot 2111a or the card connection portion 111 is provided, thereby reducing the risk of decreased structural strength of the area of ​​the wall portion 211 where the card slot 2111a or the card connection portion 111 is provided, thereby improving the assembly reliability between the battery cell 20 and the fixing member 10, thereby improving the reliability and service life of the battery 100.

[0193] It should be noted that the structure of the battery cell 20 is not limited thereto. In some embodiments, the battery cell 20 may also be other structures. For example, the housing 21 may include a shell 212 and an end cap 213. The interior of the shell 212 forms a receiving cavity 2121 having an opening 2122. The receiving cavity 2121 is used to receive the electrode assembly 22. The end cap 213 closes the opening 2122. The end cap 213 is a wall portion 211. The surface of the end cap 213 of the housing 21 that is away from the electrode assembly 22 is a second surface 2111, and the end cap 213 and the first surface 11 of the fixing member 10 are arranged facing each other in the thickness direction X of the wall portion.

[0194] In this embodiment, by setting the wall portion 211 of the outer shell 21 as the end cover 213 of the outer shell 21 for closing the opening 2122 of the shell body 212, the battery cell 20 adopting this structure is convenient for processing to form the card groove 2111a or the card connecting portion 111 on the wall portion 211, which is beneficial to reduce the difficulty of setting the card groove 2111a or the card connecting portion 111 on the wall portion 211, thereby reducing the difficulty of assembling the battery cell 20 and improving the production efficiency of the battery cell 20.

[0195] According to some embodiments of the present application, the present application further provides an electrical device, which includes the battery 100 of any of the above solutions, and the battery 100 is used to provide electrical energy to the electrical device.

[0196] The power-consuming device may be any of the aforementioned devices or systems using the battery 100 .

[0197] According to some embodiments of the present application, see Figures 2 to 11As shown, the present application provides a battery 100, which includes a box body 30, a fixing member 10 and a battery cell 20. An assembly space is formed inside the box body 30, and the battery cell 20 and the fixing member 10 are both accommodated in the assembly space, and the fixing member 10 is connected to the box body 30, and the box body 30 includes a first box body 31 and a second box body 32 arranged along the first direction Y, and the first box body 31 and the second box body 32 cover each other and jointly define the assembly space. The fixing member 10 extends along the second direction Z, and the fixing member 10 has two first surfaces 11 on both sides of the wall thickness direction X, respectively. Along the wall thickness direction X, both sides of the fixing member 10 are provided with multiple groups of battery cells 20 arranged along the second direction Z, and each group of battery cells 20 includes multiple battery cells 20 stacked along the first direction Y, and the wall thickness direction X, the first direction Y and the second direction Z are perpendicular to each other. Along the first direction Y, the shell 21 has two opposite fourth surfaces 214, and the fourth surface 214 is the surface with the largest area among the outer surfaces of the shell 21. A flow channel 13 is formed inside the fixing member 10, and the flow channel 13 is used to accommodate a heat exchange medium, and the heat exchange medium is configured to heat exchange with the battery cell 20. The battery cell 20 includes a shell 21 and an electrode assembly 22, and the shell 21 includes a shell 212 and an end cover 213. The shell 212 includes a first wall and a second wall formed in one piece, and the first wall is arranged around the second wall. Along the thickness direction X of the wall, one end of the first wall is connected to the second wall, and the other end is enclosed to form an opening 2122. The first wall and the second wall jointly define a receiving cavity 2121 for accommodating the electrode assembly 22, and the end cover 213 closes the opening 2122. The second wall is a wall portion 211. The wall portion 211 has a second surface 2111 facing away from the electrode assembly 22. Along the thickness direction X of the wall portion, the second surface 2111 and the first surface 11 are arranged facing each other and abutting each other. A plurality of slots 2111a are arranged on the second surface 2111. The first surface 11 of the fixing member 10 is provided with a plurality of snap-in portions 111 corresponding to each battery cell 20. Each snap-in portion 111 is plugged and matched with a slot 2111a. Along the thickness direction X of the wall portion, the second surfaces 2111 of the battery cells 20 located on both sides of the fixing member 10 are arranged facing each other. Each first surface 11 of the fixing member 10 abuts against the second surfaces 2111 of multiple groups of battery cells 20 located on the same side. A pressure relief mechanism 25 is also arranged on the wall portion 211. The pressure relief mechanism 25 is configured to release the internal pressure of the battery cell 20. An exhaust cavity 12 is formed inside the fixing member 10. The exhaust cavity 12 is not connected to the flow channel 13. The flow channel 13 is arranged in the cavity wall of the exhaust cavity 12. A pressure relief port 112 is provided on the first surface 11 . The pressure relief port 112 is communicated with the exhaust cavity 12 . Along the thickness direction X of the wall, the projection of the pressure relief mechanism 25 is located inside the pressure relief port 112 .Along the thickness direction X of the wall portion, the wall portion 211 faces the third surface 2112 of the electrode assembly 22, and a protrusion 2112a is formed on the third surface 2112 at a position corresponding to the slot 2111a. Along the thickness direction X of the wall portion, the protrusion 2112a abuts against the electrode assembly 22 to form an exhaust channel 26 between the electrode assembly 22 and the third surface 2112, and the exhaust channel 26 is configured to guide the gas inside the outer shell 21 to the pressure relief mechanism 25.

[0198] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0199] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery, characterized in that: include: A fixing member having a first surface; as well as A battery cell, comprising a housing and an electrode assembly, wherein the electrode assembly is accommodated in the housing, the housing has a wall portion, the wall portion has a second surface facing away from the electrode assembly, and along a thickness direction of the wall portion, the second surface is arranged facing the first surface; Wherein, one of the first surface and the second surface is provided with a card slot, and the other is provided with a card connection portion, and the card connection portion is plugged and matched with the card slot.

2. The battery according to claim 1, characterized in that The first surface abuts against the second surface.

3. The battery according to claim 1, characterized in that One of the first surface and the second surface is provided with a plurality of the card slots, and the other surface is provided with a plurality of the card connection portions, and each of the card connection portions is plug-fitted with one of the card slots.

4. The battery according to claim 1, characterized in that The battery cell further includes a pressure relief mechanism, the pressure relief mechanism is disposed on the wall portion, and the pressure relief mechanism is configured to release the internal pressure of the battery cell; An exhaust cavity is formed inside the fixing part, a pressure relief port is arranged on the first surface, the pressure relief port is communicated with the exhaust cavity, and the pressure relief mechanism is arranged opposite to the pressure relief port along the thickness direction of the wall.

5. The battery according to claim 4, characterized in that Along the thickness direction of the wall portion, the projection of the pressure relief mechanism is located inside the pressure relief port.

6. The battery according to claim 1, characterized in that A flow channel is formed inside the fixing member, and the flow channel is used to accommodate a heat exchange medium, and the heat exchange medium is configured to exchange heat with the battery cell.

7. The battery according to claim 1, characterized in that Along the thickness direction of the wall portion, both sides of the fixing member have the first surface, and both sides of the fixing member are provided with the battery cells, and the second surfaces of the battery cells on both sides of the fixing member are arranged facing each other.

8. The battery according to claim 1, characterized in that The first surface is convexly provided with the clamping portion, and the second surface is provided with the clamping groove.

9. The battery according to claim 8, characterized in that Along the thickness direction of the wall portion, the wall portion has a third surface facing the electrode assembly, and a protrusion is formed on the third surface at a position corresponding to the slot.

10. The battery according to claim 9, characterized in that Along the thickness direction of the wall portion, the protrusion abuts against the electrode assembly, so that an exhaust channel is formed between the electrode assembly and the third surface.

11. The battery according to any one of claims 1 to 10, characterized in that The battery comprises a plurality of battery cells stacked along a first direction, wherein the first direction is perpendicular to a thickness direction of the wall portion; Wherein, along the thickness direction of the wall portion, the plurality of battery cells all have the second surface, and the second surfaces of the plurality of battery cells are all arranged to face the first surface, and the card slots and the card connection portions correspond one to one.

12. The battery according to claim 11, characterized in that Along the first direction, the housing has two opposite fourth surfaces, the fourth surfaces are surfaces with the largest area among the outer surfaces of the housing, and the fourth surfaces are perpendicular to the first direction.

13. The battery according to claim 11, characterized in that The battery further comprises a box body, an assembly space is formed inside the box body, the battery cell and the fixing member are both accommodated in the assembly space, and the fixing member is connected to the box body; The box body includes a first box body and a second box body arranged along the first direction, and the first box body and the second box body cover each other and jointly define the assembly space.

14. The battery according to claim 11, characterized in that The battery includes a plurality of groups of battery cells arranged along the second direction, each group of battery cells includes a plurality of battery cells stacked along the first direction, and the thickness direction of the wall portion, the first direction, and the second direction are perpendicular to each other.

15. The battery according to any one of claims 1 to 10, characterized in that The housing comprises: A shell, comprising an integrally formed first wall and a second wall, wherein the first wall is arranged around the second wall, along the thickness direction of the wall portion, one end of the first wall is connected to the second wall, and the other end is enclosed to form an opening, and the first wall and the second wall jointly define a receiving cavity for receiving the electrode assembly; an end cap for closing the opening; Wherein, the second wall is the wall portion.

16. The battery according to any one of claims 1 to 10, characterized in that The housing comprises: A shell body, wherein a receiving cavity with an opening is formed inside, and the receiving cavity is used to receive the electrode assembly; an end cap for closing the opening; Wherein, the end cover is the wall portion.

17. An electrical device, characterized in that: The invention comprises a battery as claimed in any one of claims 1 to 16, wherein the battery is used to provide electrical energy.

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