Battery and electric equipment

Abstract

The embodiment of the invention provides a battery and electric equipment, and relates to the technical field of batteries. The battery comprises a shell, an upper-layer module, a lower-layer module and two fixing frames, wherein the shell comprises an inner cavity; the upper-layer module and the lower-layer module are sequentially stacked in the inner cavity from top to bottom in the Z direction; the two fixing frames are oppositely arranged on the two sides of the lower-layer module at intervals in the X direction and used for limiting and fixing the lower-layer module and further used for fixing the upper-layer module. Through the design of the double-layer module, higher battery capacity and power can be realized in a limited space, and the space utilization rate of the battery pack is improved. By arranging the fixing frame, the lower-layer module can be limited and fixed, and the fixing frame can also be used for fixing the upper-layer module. Namely, the upper-layer module and the lower-layer module can be connected and fixed through the fixing frame, the mounting and fixing structure of the double-layer module is simplified, and the mounting efficiency is improved. And the upper-layer module and the lower-layer module are connected through the fixing frame, so that the connection strength and the connection stability between the upper-layer module and the lower-layer module are enhanced.

Description

Technical Field

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

[0002] With the development of the electric vehicle industry, people are paying more and more attention to the endurance and safety performance of electric vehicles. The power battery system is the core component of electric vehicles, which is directly related to its motor performance, endurance, safe and reliable operation, etc. Among them, the battery pack is an important component of the power system and can be used to store the battery modules of electric vehicles. At present, in order to pursue a higher mileage, most car companies usually arrange as many battery modules as possible in the limited space inside the electric vehicle to increase the power of the entire battery pack.

[0003] Currently, most of them are designed as double-layer module battery packs. However, the installation and fixing structure of the current double-layer module battery packs is relatively complex, which makes installation inconvenient. In addition, the structural connection and fixing strength of the battery pack may be low, and the connection between the upper and lower modules may not be stable. Summary of the invention

[0004] The present invention provides a battery and an electrical device, which can simplify the installation and fixing structure of a double-layer module, improve installation efficiency, and enhance the connection strength and connection stability between upper and lower modules.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] An embodiment of the present invention provides a battery, comprising:

[0007] a housing, the housing comprising an inner cavity;

[0008] An upper module and a lower module, wherein the upper module and the lower module are sequentially stacked in the inner cavity from top to bottom along the Z direction;

[0009] Two fixing frames are arranged at opposite sides of the lower module at intervals along the X direction, and are used to limit and fix the lower module, and also to fix the upper module.

[0010] In an optional embodiment, the fixed frame includes a fixed main board and a plurality of connecting frames, the plurality of connecting frames are arranged at intervals along the Y direction and are placed along the X direction on a side of the fixed main board away from the lower module, the fixed main board is used to limit and fix the lower module, and each of the connecting frames protrudes from the fixed main board on one side toward the upper module along the Z direction.

[0011] In an optional embodiment, the upper module includes a cable tie, two end plates and a plurality of battery cells, and the plurality of battery cells are arranged in an array to form a battery cell unit; the two end plates are respectively arranged on both sides of the battery cell unit along the X direction and fixed with the cable tie; the end plate is connected to the connecting frame along the Z direction on one side close to the upper module.

[0012] In an optional embodiment, a connecting ear is provided on the end plate, a first mounting hole is formed on the connecting ear, a second mounting hole is formed on the upper end surface of the connecting frame, and a threaded fastener is passed through the first mounting hole and the second mounting hole to connect and fix the upper module and the connecting frame.

[0013] In an optional embodiment, the battery further includes a BMS fixing bracket, the BMS fixing bracket is connected to a side of at least one of the connecting frames away from the fixed main board, and a connection plane between the BMS fixing bracket and the connecting frame is parallel to a plane formed by the X direction and the Z direction.

[0014] In an optional embodiment, the battery further includes a first water-cooling plate and a second water-cooling plate, the first water-cooling plate is located between the upper module and the lower module, and the second water-cooling plate is located between the lower module and the inner bottom surface of the shell;

[0015] The first water-cooling plate is formed by profile, and the second water-cooling plate is formed by stamping.

[0016] In an optional embodiment, the battery further includes a water inlet pipe and a water outlet pipe, the water inlet pipe includes a water inlet main pipe, a first water inlet branch pipe and a second water inlet branch pipe, the first water inlet branch pipe and the second water inlet branch pipe are both connected to the water inlet main pipe, and the water inlet main pipe is used to communicate with an external cooling water inlet; the first water inlet branch pipe is connected to the first water-cooling plate, and the second water inlet branch pipe is connected to the second water-cooling plate;

[0017] The water outlet pipe includes a water outlet main pipe, a first water outlet branch pipe and a second water outlet branch pipe, the first water outlet branch pipe and the second water outlet branch pipe are both connected to the water outlet main pipe, the water outlet main pipe is used to communicate with an external cooling water outlet; the first water outlet branch pipe is connected to the first water-cooled plate; the second water outlet branch pipe is connected to the second water-cooled plate.

[0018] In an optional embodiment, the battery further comprises a plurality of water-cooling plate supporting beams, wherein the water-cooling plate supporting beams extend along the X direction and are connected to two opposite fixing frames, and the plurality of water-cooling plate supporting beams are spaced apart along the Y direction and are located between the first water-cooling plate and the lower module.

[0019] In an optional embodiment, the shell includes an upper shell and a lower shell, the fixing frame is located in the lower shell and connected to the lower shell; the upper shell and the lower shell together form the inner cavity, and the upper module and the lower module are located in the inner cavity;

[0020] The lower shell comprises a lower shell body and a mounting plate, wherein the lower shell body has a module mounting space, the lower shell body is connected to the mounting plate, and the mounting plate is convexly arranged on one side of the lower shell body along the Y direction;

[0021] The battery further comprises an external connector, which is passed through the mounting plate, and a plug of the external connector is located at a side of the mounting plate away from the upper shell.

[0022] An embodiment of the present invention further provides an electrical device, comprising the battery described in any one of the above embodiments.

[0023] The beneficial effects of the battery and the electrical equipment of the embodiments of the present invention include, for example:

[0024] The battery includes a shell, an upper module, a lower module and two fixing frames, the shell includes an inner cavity; the upper module and the lower module are stacked in the inner cavity from top to bottom in the Z direction; the design of the double-layer module allows a higher battery capacity and power to be achieved in a limited space, thereby improving the space utilization of the battery pack. The design of the double-layer module improves the reliability of the battery and avoids the situation where the battery as a whole cannot work due to the failure of a single module. The two fixing frames are arranged on both sides of the lower module at relative intervals along the X direction, and are used to limit and fix the lower module, and also to fix the upper module. By setting the fixing frame, the lower module can be limited and fixed, and the fixing frame can also be used to fix the upper module. That is, the connection and fixation of the upper module and the lower module can be achieved by the fixing frame, which simplifies the installation and fixing structure of the double-layer module and improves the installation efficiency. The connection strength and connection stability between the upper and lower modules are also enhanced by connecting the upper module and the lower module through the fixing frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, 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 invention 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.

[0026] Figure 1 A schematic diagram of a battery provided in an embodiment of the present invention;

[0027] Figure 2An exploded schematic diagram of a battery provided in an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of a battery with an upper housing removed provided in an embodiment of the present invention;

[0029] Figure 4 A schematic diagram of a first viewing angle of a lower housing portion structure provided in an embodiment of the present invention;

[0030] Figure 5 A schematic diagram of a lower housing portion structure from a second viewing angle provided in an embodiment of the present invention;

[0031] Figure 6 It is a schematic diagram of a fixing frame provided in an embodiment of the present invention.

[0032] Icon: 1000-battery; 100-housing; 110-upper housing; 120-lower housing; 121-lower housing body; 122-mounting plate; 123-mounting piece; 200-upper module; 210-cable tie; 220-end plate; 221-connecting ear; 2211-first mounting hole; 230-battery cell; 240-threaded fastener; 300-lower module; 400-fixing frame; 410-fixed main board; 411-first hollow cavity; 42 0-connecting frame; 421-second mounting hole; 422-second hollow cavity; 430-BMS fixing bracket; 500-first water-cooling plate; 600-second water-cooling plate; 710-water inlet pipe; 711-water inlet main pipe; 712-first water inlet branch pipe; 713-second water inlet branch pipe; 720-water outlet pipe; 721-water outlet main pipe; 722-first water outlet branch pipe; 723-second water outlet branch pipe; 800-water-cooling plate supporting beam; 900-external connector. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0036] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0038] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0039] With the development of the electric vehicle industry, people are paying more and more attention to the endurance and safety performance of electric vehicles. The power battery system is the core component of electric vehicles, which is directly related to its motor performance, endurance, safe and reliable operation, etc. Among them, the battery pack is an important component of the power system and can be used to store the battery modules of electric vehicles. At present, in order to pursue a higher mileage, most car companies usually arrange as many battery modules as possible in the limited space inside the electric vehicle to increase the power of the entire battery pack. At present, most of them are designed as double-layer module battery packs, but the current double-layer module battery pack has a complex installation and fixing structure, which is inconvenient to install, and the structural connection and fixing strength of the battery pack may be low, and the connection between the upper and lower modules may not be stable.

[0040] Based on this, see Figure 1 and Figure 2 The battery 1000 provided in the embodiment of the present invention can effectively improve the above-mentioned technical problems. The battery 1000 can simplify the installation and fixing structure of the double-layer module, improve the installation efficiency, and enhance the connection strength and connection stability between the upper and lower modules 300. The electrical equipment having the battery 1000 also has the same function as the battery 1000.

[0041] The power-consuming device in this embodiment includes a device to be consumed and a battery 1000. The battery 1000 provides power to the device to be consumed to realize various functions of the device to be consumed. The device to be consumed may be an electric vehicle. The battery 1000 is disposed in the body of the electric vehicle. The battery 1000 provides power to the body to realize various functions of the body. The device to be consumed may also be other power-consuming devices such as a mobile power supply and a smart home, which are not limited here.

[0042] Figure 1 A schematic diagram of a battery 1000 provided in an embodiment of the present invention; Figure 2 FIG. 1 is an exploded schematic diagram of a battery 1000 provided in an embodiment of the present invention. Figure 1 and Figure 2 As shown, the battery 1000 in this embodiment includes a shell 100, an upper module 200, a lower module 300 and two fixing frames 400. The shell 100 includes an inner cavity; the upper module 200 and the lower module 300 are stacked in the inner cavity from top to bottom along the Z direction; the two fixing frames 400 are arranged on both sides of the lower module 300 at a relative interval along the X direction, which are used to limit and fix the lower module 300, and also to fix the upper module 200. The design of the double-layer module allows a higher capacity and power of the battery 1000 to be achieved in a limited space, thereby improving the space utilization of the battery pack. The design of the double-layer module improves the reliability of the battery 1000 and avoids the situation where the battery 1000 cannot work as a whole due to the failure of a single module. By setting the fixing frame 400, the lower module 300 can be limited and fixed, and the fixing frame 400 can also be used to fix the upper module 200. That is, the upper module 200 and the lower module 300 can be connected and fixed by the fixing frame 400, which simplifies the installation and fixing structure of the double-layer module and improves the installation efficiency. Moreover, the connection between the upper module 200 and the lower module 300 by the fixing frame 400 also enhances the connection strength and connection stability between the upper module 200 and the lower module 300.

[0043] See also Figure 1 and Figure 2 The housing 100 in this embodiment includes an upper housing 110 and a lower housing 120, and the fixing frame 400 is located in the lower housing 120 and connected to the lower housing 120; the upper housing 110 and the lower housing 120 together form an inner cavity, and the upper module 200 and the lower module 300 are located in the inner cavity. The inner cavity is used to install the upper module 200 and the lower module 300. The upper housing 110 and the lower housing 120 can also be connected by welding, clamping, plugging and other connection methods, which are not limited here. After the upper and lower housings 120 are connected, the inner cavity is a closed chamber, and the upper housing 110 and the lower housing 120 completely protect the upper module 200 and the lower module 300. In order to facilitate subsequent maintenance, the upper housing 110 and the lower housing 120 in this embodiment are detachably connected. Specifically, the upper housing 110 and the lower housing 120 in this embodiment are connected by threaded fasteners 240, such as bolts, screws, etc. That is, the upper shell 110 is provided with a third mounting hole, the lower shell 120 is provided with a fourth mounting hole, and the threaded fastener 240 is passed through the third mounting hole and the fourth mounting hole to connect the upper shell 110 and the lower shell 120 .

[0044] In order to facilitate the connection of the battery 1000 with other devices, the lower housing 120 in this embodiment is also provided with a plurality of mounting members 123, which are distributed at intervals, and each mounting member 123 is provided with a connection hole, which is used to pass threaded fasteners such as bolts and screws to connect the lower housing 120 with other devices. Of course, the mounting members 123 can also be designed in other structural forms, and the lower housing 120 can be connected with other devices by plugging, snapping, etc., which is not limited here.

[0045] In addition, to facilitate the insertion and removal of connectors, please refer to Figure 2 , and combined with Figure 3 and Figure 5 , Figure 3 A schematic diagram of a battery 1000 with the upper housing 110 removed provided in an embodiment of the present invention; Figure 5 1 is a schematic diagram of a partial structure of the lower housing 120 provided in an embodiment of the present invention from a second viewing angle. The lower housing 120 in this embodiment includes a lower housing body 121 and a mounting plate 122. The lower housing body 121 has a module mounting space therein. The lower housing body 121 is connected to the mounting plate 122, and the mounting plate 122 is convexly arranged on one side of the lower housing body 121 along the Y direction. The battery 1000 also includes an external connector 900, which is inserted through the mounting plate 122, and the plug of the external connector 900 is located on the side of the mounting plate 122 away from the upper housing 110. By arranging the plug of the external connector 900 below the lower housing 120, it is convenient for the external connector 900 to be connected to an external device or circuit, and the connection of the external device or circuit will not be interfered by the housing 100. Moreover, such an arrangement of the external connector 900 can also prevent the liquid outside the battery 1000 from being retained at the plug of the external connector 900, thereby ensuring the normal use of the external connector 900 or increasing its service life. The plug of the external connector 900 is located on the side of the mounting plate 122 away from the upper shell 110, that is, the external connector 900 is located on the lower side of the mounting plate 122, and is not easily stained by the liquid outside the battery 1000. In addition, due to the influence of gravity, even if liquid flows here, it will not accumulate. Of course, the external connector 900 can also be set on the side of the mounting plate 122 along the Y direction and away from the inner cavity. Setting it at this position also facilitates the plug-in connection of the plug-in. In addition, the external connector 900 can also be set at other positions of the upper shell 110 or the lower shell 120, depending on the actual installation space and specific installation conditions, and is not limited here.

[0046] Figure 4 Schematic diagram of a first viewing angle of a partial structure of the lower housing 120 provided in an embodiment of the present invention, Figure 6 FIG. 4 is a schematic diagram of a fixing frame 400 provided in an embodiment of the present invention. Figure 2 , and combined with Figure 4 and Figure 6In this embodiment, each fixing frame 400 includes a fixing main board 410 and a plurality of connecting frames 420. The plurality of connecting frames 420 are arranged at intervals along the Y direction and are placed on the side of the fixing main board 410 away from the lower module 300 along the X direction. The fixing main board 410 is used to limit and fix the lower module 300. Each connecting frame 420 protrudes from the fixing main board 410 on the side facing the upper module 200 along the Z direction. The X direction in this embodiment is perpendicular to the Z direction, and the Y direction is perpendicular to both the X direction and the Z direction. Two fixing frames 400 are arranged at intervals along the X direction at the lower layer. The two fixing frames 400 and the lower shell 120 jointly enclose a lower module installation cavity. The lower module 300 is arranged in the lower module installation cavity. The lower module installation cavity can limit the lower module 300 from displacement along the X direction and the Y direction. The two fixing frames 400 can limit the lower module 300 and fix the lower module 300 so that it will not move along the X direction. Specifically, the height of the fixed mainboard 410 in the present embodiment along the Z direction is the same as the height of the lower module 300. This design can limit and fix the lower module 300 without affecting the installation of the upper module 200 or other structural parts. Of course, the height of the fixed mainboard 410 can also be slightly lower than the height of the lower module 300, or the height of the fixed mainboard 410 can be slightly higher than the height of the lower module 300.

[0047] To reduce weight and cost, please continue to refer to Figure 2 , and combined with Figure 4 and Figure 6 , the fixed mainboard 410 in this embodiment is a hollow structure. In order to ensure the structural strength and connection stability of the fixed mainboard 410, the fixed mainboard 410 in this embodiment is provided with a plurality of first hollow cavities 411, and the plurality of first hollow cavities 411 are arranged in an array. Specifically, the number of the first hollow cavities 411 in this embodiment is six, distributed in two columns along the X direction, and distributed in three rows along the Z direction. Of course, the number of the first hollow cavities 411 can also be one, two, three, four, five, etc., depending on the installation situation, which is not limited here. In addition, a first hollow cavity 411 is provided in the fixed mainboard 410, and the first hollow cavity 411 can also be used for wiring, piping structure or setting other structures to make full use of the space and improve the space utilization rate of the battery 1000 installation. The fixed mainboard 410 can also be a solid structure, which is not limited here.

[0048] The connecting frame 420 in this embodiment can be integrally arranged with the fixed mainboard 410. The connecting frame 420 can be fixedly connected to the mainboard 410 by welding, bonding, etc. Of course, the connecting frame 420 can also be detachably connected to the fixed mainboard 410, such as plugging, clamping, etc., which is not limited here. In order to facilitate the connection and fixation of the connecting frame 420 with the upper module 200, each connecting frame 420 in this embodiment protrudes from the fixed mainboard 410 along the Z direction toward the side of the upper module 200. The protruding part of the connecting frame 420 is used to connect with the upper module 200. One side of the connecting frame 420 along the Z direction can also be designed to be flush with one side of the fixed mainboard 410 along the Z direction, or slightly lower than one side of the fixed mainboard 410 along the Z direction, which is determined according to the actual installation situation and is not limited here. In order to reduce weight, reduce costs, and to improve space utilization, the connecting frame 420 in this embodiment is also provided with a plurality of second hollow cavities 422, and the plurality of second hollow cavities 422 are arranged in an array. Specifically, the number of the second hollow cavities 422 in this embodiment is three, distributed in three rows along the Z direction. Of course, the number of the second hollow cavities 422 can also be one, two, three, four, five, etc., depending on the installation situation, and is not limited here. In addition, the second hollow cavity 422 is opened in the connecting frame 420, and the second hollow cavity 422 can also be used for wiring, piping structure or setting other structures to make full use of the space and improve the space utilization rate of the battery 1000 installation. The connecting frame 420 can also be designed as a solid structure, which is not limited here.

[0049] See also Figure 2 In order to improve the installation reliability of the entire battery 1000 and the structural strength of the battery 1000, the upper module 200 and the lower module 300 in this embodiment adopt two different battery 1000 module forms. Specifically, the upper module 200 in this embodiment is a cable tie 210 module form, and the lower module 300 is a CTP structure form. CTP technology directly integrates the battery cell 230 into the battery 1000 package, eliminating the module link. The upper module 200 and the lower module 300 can also adopt two identical battery 1000 module forms.

[0050] In detail, the upper module 200 in this embodiment includes a tie 210, two end plates 220 and a plurality of cells 230, wherein the plurality of cells 230 are arranged in an array to form a cell 230 unit; the two end plates 220 are respectively arranged on both sides of the cell 230 unit along the X direction and fixed by the tie 210; the end plates 220 are connected to the connecting frame 420 along the Z direction close to the side of the upper module 200. Of course, the upper module 200 can also be assembled in other structural forms, such as CTP structural form assembly, etc., which is not limited here.

[0051] See also Figure 2 , and combined with Figure 4 and Figure 6, a connecting ear 221 is provided on the end plate 220, a first mounting hole 2211 is provided on the connecting ear 221, a second mounting hole 421 is provided on the upper end surface of the connecting frame 420, and a threaded fastener 240 is passed through the first mounting hole 2211 and the second mounting hole 421 to connect and fix the upper module 200 and the connecting frame 420. The threaded fastener 240 here can be a bolt, a screw, etc., which is not limited here. Of course, the end plate 220 and the connecting frame 420 can also be connected by other methods such as welding, bonding, clamping, plugging, etc., which are not limited here. For example, a buckle structure is provided on the connecting ear 221 of the end plate 220, and a card slot that cooperates with the buckle structure is provided on the connecting frame 420; or, a card slot is provided on the connecting ear 221 of the end plate 220, and a buckle structure that cooperates with the card slot is provided on the connecting frame 420.

[0052] In addition, in order to facilitate the installation of BMS (battery 1000 management system), the battery 1000 in this embodiment also includes a BMS fixing bracket 430, and the BMS fixing bracket 430 is connected to the side of at least one connecting frame 420 away from the fixed main board 410, and the connection plane between the BMS fixing bracket 430 and the connecting frame 420 is parallel to the plane formed by the X direction and the Z direction. By setting the BMS fixing bracket 430, the BMS can be quickly assembled, saving installation time and improving installation efficiency. Moreover, setting the BMS fixing bracket 430 on the connecting frame 420 can also enhance the overall structural strength of the BMS fixing bracket 430, and the connecting frame 420 can provide a certain support force for the BMS fixing bracket 430. The BMS includes a battery disconnect unit (BDU), and the main function of the BDU is to disconnect or connect the electrical connection between the battery pack and the load as needed to ensure that the battery 1000 is safely managed under different working conditions. The BDU is usually connected to the battery management system (BMS), which can monitor the status of the battery 1000 in real time, collect data and generate alarms or abnormal reports to ensure the healthy and safe operation of the battery 1000. In order to save installation space, the BDU structure in this embodiment is installed in the first hollow cavity 411 of the fixed mainboard 410, and / or the BDU structure is installed in the second hollow cavity 422 of the connecting frame 420. Of course, the BDU structure can also be installed at other positions of the housing 100, which is not limited here.

[0053] In batteries, liquid cooling plates are important components for temperature management. Its main function is to effectively dissipate heat through liquid circulation to ensure that the battery pack remains within a safe temperature range during operation. Liquid cooling technology has higher heat conduction efficiency than air cooling, so liquid cooling plates are widely used in high-power density and high-energy density battery systems, especially in electric vehicles (EVs), energy storage systems, and some high-performance devices. Batteries generate a lot of heat during charging and discharging, especially during high-power discharge. If the battery temperature is too high, it may cause battery performance to deteriorate or even thermal runaway (such as battery explosion and fire caused by overheating). Liquid cooling plates remove the heat generated by the battery by circulating coolant (such as water or special coolant) to help keep the battery pack within a safe operating temperature range. Temperature has a significant impact on battery performance. High temperature accelerates the internal chemical reaction of the battery, resulting in capacity decay and shortened cycle life; low temperature reduces the discharge efficiency and charging rate of the battery. The liquid cooling system can ensure the uniformity of battery temperature and avoid local overheating or overcooling, thereby improving the overall performance of the battery and extending its service life.

[0054] In order to improve the service life of the module in the battery 1000, the battery 1000 in this embodiment also includes a first water-cooled plate 500 and a second water-cooled plate 600. The first water-cooled plate 500 is located between the upper module 200 and the lower module 300, and the second water-cooled plate 600 is located between the lower module 300 and the inner bottom surface of the shell 100. The first water-cooled plate 500 in this embodiment is formed by profile molding, and the second water-cooled plate 600 is formed by stamping. Profile molding refers to the process of processing raw materials such as metal, plastic, rubber, etc. into long strips of material with a specific cross-section through a certain processing method. Profile molding has the characteristics of high efficiency, low cost, high material utilization, strength and precision. Stamping is a processing method that applies pressure to a metal material through a stamping die to cause it to undergo plastic deformation and finally obtain the desired shape and size. Stamping has the characteristics of high efficiency, low cost, high precision and strong adaptability. Profile water cooling has good load-bearing capacity and relatively high structural strength. The flow channel of stamped water cooling is more fluid, and the structural strength of the lower battery 1000 module is guaranteed to a certain extent, so a stamped water cooling plate can be selected.

[0055] Of course, the first water-cooling plate 500 and the second water-cooling plate 600 can also be formed by other processes, depending on the assembly form of the upper module 200 and the lower module 300, and the structural installation strength requirements, and are not limited here. As long as the first water-cooling plate 500 and the second water-cooling plate 600 can ensure the liquid cooling effect while meeting the installation strength requirements.

[0056] See also Figure 3 and Figure 4In order to facilitate the simultaneous regulation of the inlet and outlet of the first water-cooled plate 500 and the second water-cooled plate 600, the battery 1000 in this embodiment further includes a water inlet pipe 710 and a water outlet pipe 720. The water inlet pipe 710 includes a water inlet main pipe 711, a first water inlet branch pipe 712 and a second water inlet branch pipe 713. The first water inlet branch pipe 712 and the second water inlet branch pipe 713 are both connected to the water inlet main pipe 711, and the water inlet main pipe 711 is used to communicate with an external cooling water inlet; the first water inlet branch pipe 712 is connected to the first water-cooled plate 500, and the second water inlet branch pipe 713 is connected to the second water-cooled plate 600. The water outlet pipe 720 includes a water outlet main pipe 721, a first water outlet branch pipe 722 and a second water outlet branch pipe 723. The first water outlet branch pipe 722 and the second water outlet branch pipe 723 are both connected to the water outlet main pipe 721, and the water outlet main pipe 721 is used to communicate with the external cooling water outlet; the first water outlet branch pipe 722 is connected to the first water-cooled plate 500; the second water outlet branch pipe 723 is connected to the second water-cooled plate 600. In order to facilitate the control of the liquid flow and flow rate of the two water-cooled plates respectively, so as to control the temperature of the upper module 200 and the lower module 300 respectively, a flow control valve can be set on the branch pipe. Of course, a water inlet pipe 710 and a water outlet pipe 720 can also be set for the first water-cooled plate 500 and the second water-cooled plate 600 respectively. Each water inlet pipe 710 or each water outlet pipe 720 corresponds to a water-cooled plate, which is not limited here.

[0057] In order to support the first water-cooled plate 500 and improve the structural strength of the entire battery 1000, the battery 1000 in this embodiment also includes a plurality of water-cooled plate support beams 800, which extend along the X direction and are connected to two opposite fixing frames 400, and a plurality of water-cooled plate support beams 800 are arranged at intervals along the Y direction and are located between the first water-cooled plate 500 and the lower module 300. The two ends of the water-cooled plate support beam 800 can be connected to the two fixing frames 400 respectively using threaded fasteners 240 such as bolts. Specifically, the cross-sectional shape of the connecting frame 420 in the plane formed by the Z direction and the Y direction in this embodiment is a "concave" shape, that is, the connecting frame 420 includes a connecting frame body and two lugs protruding from the connecting frame body along the Z direction, the two lugs are arranged at intervals, and the two lugs and the connecting frame body together form a groove. The water-cooled plate support beam 800 is installed and threadedly connected to the upper end surface of the connecting frame 420 body groove. When the end plate 220 of the upper module 200 is connected to the two lugs, the end plate 220 is located above the groove, which can limit the water-cooled plate support beam 800 from moving along the Z direction. The two lugs can limit the water-cooled plate support beam 800 from moving along the Y direction.

[0058] Of course, the water-cooled plate support beam 800 can also be connected to the fixing frame 400 by other connection methods, such as clamping, welding, plugging, etc., which are not limited here. In addition, in order to ensure the connection strength of the water-cooled plate support beam 800, the water-cooled plate support beam 800 in this embodiment is welded to the first water-cooled plate 500. In addition, in order to achieve insulation between the water-cooled plate support beam 800 and the lower module 300 and provide certain buffer protection, in this embodiment, foam is arranged between the water-cooled plate support beam 800 and the lower module 300, and the foam can also strengthen the structural strength of the upper module 200.

[0059] In summary, the battery 1000 includes a shell 100, an upper module 200, a lower module 300 and two fixing frames 400. The shell 100 includes an inner cavity; the upper module 200 and the lower module 300 are stacked in the inner cavity from top to bottom along the Z direction; the two fixing frames 400 are arranged on both sides of the lower module 300 at a relative interval along the X direction, which are used to limit and fix the lower module 300, and also to fix the upper module 200. The design of the double-layer module allows a higher capacity and power of the battery 1000 to be achieved in a limited space, thereby improving the space utilization of the battery pack. The design of the double-layer module improves the reliability of the battery 1000 and avoids the situation where the battery 1000 cannot work as a whole due to the failure of a single module. By setting the fixing frame 400, the lower module 300 can be limited and fixed, and the fixing frame 400 can also be used to fix the upper module 200. That is, the upper module 200 and the lower module 300 can be connected and fixed by the fixing frame 400, which simplifies the installation and fixing structure of the double-layer module and improves the installation efficiency. Moreover, the connection between the upper module 200 and the lower module 300 by the fixing frame 400 also enhances the connection strength and connection stability between the upper module 200 and the lower module 300.

[0060] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A battery, characterized in that: include: A housing (100), wherein the housing (100) comprises an inner cavity; An upper module (200) and a lower module (300), wherein the upper module (200) and the lower module (300) are sequentially stacked in the inner cavity from top to bottom along the Z direction; Two fixing frames (400) are arranged at opposite sides of the lower module (300) at intervals along the X direction, and are used to positionally fix the lower module (300) and also to fix the upper module (200).

2. The battery according to claim 1, characterized in that The fixing frame (400) comprises a fixing main board (410) and a plurality of connecting frames (420); the plurality of connecting frames (420) are arranged at intervals along the Y direction and are placed along the X direction on a side of the fixing main board (410) away from the lower module (300); the fixing main board (410) is used to limit and fix the lower module (300); and each of the connecting frames (420) protrudes from the fixing main board (410) on a side facing the upper module (200) along the Z direction.

3. The battery according to claim 2, characterized in that The upper module (200) comprises a cable tie (210), two end plates (220) and a plurality of battery cells (230), wherein the plurality of battery cells (230) are arranged in an array to form a battery cell unit; the two end plates (220) are respectively arranged on both sides of the battery cell unit along the X direction and fixed by the cable tie (210); and the end plates (220) are connected to a side of the connecting frame (420) close to the upper module (200) along the Z direction.

4. The battery according to claim 3, characterized in that The end plate (220) is provided with a connecting ear (221), and the connecting ear (221) is provided with a first mounting hole (2211). The upper end surface of the connecting frame (420) is provided with a second mounting hole (421), and a threaded fastener (240) is inserted through the first mounting hole (2211) and the second mounting hole (421) to connect and fix the upper module (200) and the connecting frame (420).

5. The battery according to claim 2, characterized in that The battery further comprises a BMS fixing bracket (430), wherein the BMS fixing bracket (430) is connected to a side of at least one of the connecting brackets (420) away from the fixed main board (410), and a connecting plane between the BMS fixing bracket (430) and the connecting bracket (420) is parallel to a plane formed by the X direction and the Z direction.

6. The battery according to claim 1, characterized in that The battery further comprises a first water-cooling plate (500) and a second water-cooling plate (600), wherein the first water-cooling plate (500) is located between the upper module (200) and the lower module (300), and the second water-cooling plate (600) is located between the lower module (300) and the inner bottom surface of the shell (100); The first water-cooling plate (500) is formed by profile, and the second water-cooling plate (600) is formed by stamping.

7. The battery according to claim 6, characterized in that The battery further comprises a water inlet pipe (710) and a water outlet pipe (720); the water inlet pipe (710) comprises a water inlet main pipe (711), a first water inlet branch pipe (712) and a second water inlet branch pipe (713); the first water inlet branch pipe (712) and the second water inlet branch pipe (713) are both in communication with the water inlet main pipe (711); the water inlet main pipe (711) is used to be in communication with an external cooling water inlet; the first water inlet branch pipe (712) is in communication with the first water cooling plate (500), and the second water inlet branch pipe (713) is in communication with the second water cooling plate (600); The water outlet pipe (720) comprises a water outlet main pipe (721), a first water outlet branch pipe (722) and a second water outlet branch pipe (723); the first water outlet branch pipe (722) and the second water outlet branch pipe (723) are both connected to the water outlet main pipe (721); the water outlet main pipe (721) is used to connect to an external cooling water outlet; the first water outlet branch pipe (722) is connected to the first water cooling plate (500); and the second water outlet branch pipe (723) is connected to the second water cooling plate (600).

8. The battery according to claim 6, characterized in that The battery further comprises a plurality of water-cooling plate supporting cross beams (800), wherein the water-cooling plate supporting cross beams (800) extend along the X direction and are connected to two opposite fixing frames (400), and the plurality of water-cooling plate supporting cross beams (800) are arranged at intervals along the Y direction and are located between the first water-cooling plate (500) and the lower module (300).

9. The battery according to any one of claims 1 to 8, characterized in that: The housing (100) comprises an upper housing (110) and a lower housing (120); the fixing frame (400) is located inside the lower housing (120) and is connected to the lower housing (120); the upper housing (110) and the lower housing (120) together form the inner cavity; the upper module (200) and the lower module (300) are located inside the inner cavity; The lower shell (120) comprises a lower shell body (121) and a mounting plate (122); a module mounting space is provided inside the lower shell body (121); the lower shell body (121) is connected to the mounting plate (122), and the mounting plate (122) is protruded on one side of the lower shell body (121) along the Y direction; The battery (1000) further comprises an external connector (900), wherein the external connector (900) is inserted through the mounting plate (122), and a plug of the external connector (900) is located on a side of the mounting plate (122) away from the upper housing (110).

10. An electrical device, characterized in that: A battery comprising any one of claims 1 to 9.

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