A power battery device and an electric vehicle

Abstract

The embodiment of the application provides a kind of power battery device and electric vehicle, it is related to power battery technical field.The power battery device includes battery cell module, shell and multiple heat insulation groove cover plates;The battery cell module includes multiple battery cells, and the battery cell includes battery cell top cover;The shell is provided with multiple battery cell placing grooves, and the multiple battery cells are placed on the multiple battery cell placing grooves respectively, two adjacent battery cell placing grooves are provided with a heat insulation groove, the first side of the shell is provided with first waterway opening, the second side of the shell is provided with second waterway opening, and the first waterway opening and the second waterway opening are communicated by the heat insulation groove;The heat insulation groove cover plate is sealedly connected with the heat insulation groove, the battery cell top cover.The power battery device achieves the technical effect of integration of power battery.

Description

Technical Field

[0001] This application relates to the field of power battery technology, and more specifically, to a power battery device and an electric vehicle. Background Technology

[0002] Currently, new energy vehicles refer to automobiles that use unconventional vehicle fuels as their power source (or use conventional vehicle fuels but employ new onboard power devices), integrating advanced technologies in vehicle power control and drive, resulting in vehicles with advanced technical principles and new technologies and structures. One type of new energy vehicle uses a power battery, making the battery's capacity a key factor in its power. Battery pack space is extremely limited, and both battery manufacturers and OEMs strive to fit batteries with higher capacities within a confined space.

[0003] In existing technologies, the expansion of the battery is generally absorbed by a U-shaped frame, but the U-shaped frame and the battery structure are independent of each other; heat insulation is achieved by other materials such as aerogel, but the aerogel and the battery structure are independent of each other, and the water cooling plate and the battery mechanism are also independent of each other, making it difficult to achieve battery integration and multi-functionality. Summary of the Invention

[0004] The purpose of this application is to provide a power battery device and an electric vehicle that can achieve the technical effect of power battery integration.

[0005] In a first aspect, embodiments of this application provide a power battery device, including a cell module, a housing, and multiple heat insulation groove covers;

[0006] The battery cell module includes multiple battery cells, and each battery cell includes a top cover.

[0007] The housing is provided with multiple battery cell placement slots, and the multiple battery cells are respectively placed in the multiple battery cell placement slots. A heat insulation slot is provided between two adjacent battery cell placement slots. A first water channel is provided on the first side of the housing, and a second water channel is provided on the second side of the housing. The first water channel and the second water channel are connected through the heat insulation slot.

[0008] The heat insulation groove cover plate is sealed to the heat insulation groove and the top cover of the battery cell.

[0009] In the above-mentioned implementation process, the power battery device installs the battery cells in the battery cell placement slots and sets a heat insulation slot between two adjacent battery cell placement slots. The heat insulation slot is connected to the cooling water through the first water channel and the second water channel. Therefore, the heat insulation slot can serve as a heat insulation device for adjacent battery cells, allow cooling water to circulate and regulate the temperature, and absorb the expansion of the battery cells due to its hollow structure. Thus, the power battery device can achieve the technical effect of power battery integration.

[0010] Furthermore, the power battery device also includes a first water-cooled plate and a second water-cooled plate. The first water-cooled plate is fixedly installed on a first side of the housing and is connected to the first water channel. The second water-cooled plate is fixedly installed on a second side of the housing and is connected to the second water channel.

[0011] Furthermore, the first water-cooled plate is provided with a water outlet and a tributary water outlet, the water outlet being connected to the tributary water outlet, and the tributary water outlet being connected to the first water channel.

[0012] Furthermore, the second water-cooled plate is provided with a water inlet and a branch water inlet, the water inlet being connected to the branch water inlet, and the branch water inlet being connected to the second water channel.

[0013] Furthermore, the housing is provided with a mounting point mechanism on its first or second side.

[0014] Furthermore, the power battery device also includes a busbar, which connects the individual cells in the cell module in series or in parallel.

[0015] Furthermore, the battery cell module is provided with a total positive output terminal and a total negative output terminal.

[0016] Furthermore, the battery cell also includes a heat-sealed edge, a battery stack, and an adapter plate;

[0017] The cell top cover is mounted on the battery stack, the hot-melt sealing edge is located at the connection between the cell top cover and the battery stack, and the adapter piece is located on both sides of the battery stack.

[0018] Furthermore, the battery cell also includes a sealing insulating film, which covers the battery stack and is fixedly connected to the heat-sealed edge.

[0019] Secondly, embodiments of this application provide an electric vehicle, which includes the power battery device described in any of the first aspects.

[0020] Other features and advantages disclosed in this application will be set forth in the following description, or some features and advantages may be inferred from the description or determined without doubt, or may be learned by practicing the above-described technology disclosed in this application.

[0021] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an exploded structural diagram of a power battery device provided in an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the structure of the power battery device provided in the embodiments of this application;

[0025] Figure 3 This is a schematic diagram of the structure of the shell provided in an embodiment of this application;

[0026] Figure 4 An exploded structural diagram of the first water-cooled plate, the second water-cooled plate, and the shell provided in an embodiment of this application;

[0027] Figure 5 A schematic diagram of the assembly structure of the first water-cooled plate, the second water-cooled plate, and the shell provided in the embodiments of this application;

[0028] Figure 6 This is a schematic diagram of the structure of the first water-cooled plate provided in an embodiment of this application;

[0029] Figure 7 This is a schematic diagram of the assembly of the bus and battery module provided in an embodiment of this application;

[0030] Figure 8 This is a schematic diagram of the structure of the heat insulation groove cover plate provided in the embodiments of this application;

[0031] Figure 9 This is a side view of the power battery device provided in an embodiment of this application;

[0032] Figure 10 This is a cross-sectional view of the power battery device provided in the embodiments of this application;

[0033] Figure 11 This is a partially enlarged structural schematic diagram of the power battery device provided in the embodiments of this application;

[0034] Figure 12 This is a front view structural diagram of the battery cell provided in an embodiment of this application;

[0035] Figure 13 This is a schematic diagram of the exploded structure of a battery cell provided in an embodiment of this application;

[0036] Figure 14This is a schematic diagram of the battery cell structure provided in an embodiment of this application.

[0037] Icons: Cell module 100; Cell 110; Cell top cover 111; Hot melt sealing edge 112; Battery stack 113; Adapter piece 114; Sealing insulation film 115; Positive terminal 116; Negative terminal 117; Housing 200; Cell placement slot 210; Heat insulation slot 220; First water channel 230; Mounting point mechanism 240; Heat insulation slot cover 300; First water cooling plate 410; Water outlet 411; Branch water outlet 412; Second water cooling plate 420; Water inlet 421; Busbar 510; Total positive output terminal 520; Total negative output terminal 530. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0039] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0040] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0041] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0042] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0043] This application provides a power battery device and an electric vehicle, which can be applied to the integration process of power batteries. The power battery device installs battery cells in cell placement slots and sets a heat insulation slot between two adjacent cell placement slots. The heat insulation slot is connected to cooling water through a first water channel and a second water channel. Therefore, the heat insulation slot can serve as a heat insulation device for adjacent battery cells, allow cooling water to circulate and regulate the temperature, and absorb the expansion of the battery cells due to its hollow structure. Thus, this power battery device can achieve the technical effect of power battery integration.

[0044] Please see Figures 1 to 3 , Figure 1 This is an exploded structural diagram of the power battery device provided in the embodiments of this application. Figure 2 This is a schematic diagram of the structure of the power battery device provided in the embodiments of this application. Figure 3 This is a schematic diagram of the casing provided in an embodiment of this application; the power battery device includes a cell module 100, a casing 200, and multiple heat insulation groove covers 300.

[0045] For example, the battery module 100 includes a plurality of battery cells 110, and each battery cell 110 includes a battery cell top cover 111.

[0046] For example, the housing 200 is provided with a plurality of battery cell placement slots 210, and a plurality of battery cells 110 are respectively placed on the plurality of battery cell placement slots 210. A heat insulation slot 220 is provided between two adjacent battery cell placement slots 210. A first water channel 230 is provided on the first side of the housing 200, and a second water channel is provided on the second side of the housing 200. The first water channel and the second water channel are connected through the heat insulation slot.

[0047] It should be noted that the second waterway, which corresponds to the first waterway outlet 230, is not marked on the diagram.

[0048] In some embodiments, the housing 200 is provided with a mounting point mechanism 240 on a first or second side.

[0049] For example, the mounting point mechanism 240 provides mounting points for the entire power battery device, thereby facilitating installation.

[0050] Optionally, the cell top cover 111, the housing 200, and the heat insulation groove cover 300 are sealed by laser welding.

[0051] For example, the heat insulation groove cover 300 is sealed to the heat insulation groove 220 and the battery cell top cover 111.

[0052] For example, the power battery device installs the battery cells 110 in the battery cell placement slots 210 and sets a heat insulation slot 220 between two adjacent battery cell placement slots 110. The heat insulation slot 220 is connected to the cooling water through the first water channel 230 and the second water channel. Therefore, the heat insulation slot 220 can serve as a heat insulation device for adjacent battery cells, allow cooling water to circulate and regulate the temperature, and absorb the expansion of the battery cells due to its hollow structure. Thus, the power battery device can achieve the technical effect of power battery integration.

[0053] Please see Figures 4 to 6 , Figure 4 This is an exploded structural diagram of the first water-cooled plate, the second water-cooled plate, and the shell provided in an embodiment of this application. Figure 5 This is a schematic diagram of the assembly structure of the first water-cooled plate, the second water-cooled plate, and the shell provided in an embodiment of this application. Figure 6 This is a schematic diagram of the structure of the first water-cooled plate provided in an embodiment of this application.

[0054] For example, the power battery device also includes a first water-cooling plate 410 and a second water-cooling plate 420. The first water-cooling plate 410 is fixedly installed on the first side of the housing 200 and is connected to the first water channel 230. The second water-cooling plate 420 is fixedly installed on the second side of the housing 200 and is connected to the second water channel.

[0055] For example, the first water-cooled plate 410 is provided with an outlet 411 and a branch outlet 412. The outlet 411 is connected to the branch outlet 412, and the branch outlet 412 is connected to the first water channel 230.

[0056] For example, the second water-cooled plate 420 is provided with a water inlet 421 and a branch water inlet, the water inlet 421 is connected to the branch water inlet, and the branch water inlet is connected to the second water channel.

[0057] For example, the second water-cooled plate 420 and the first water-cooled plate 410 are arranged symmetrically, which will not be described in detail here.

[0058] Please see Figure 7 , Figure 7 This is a schematic diagram of the assembly of the bus and battery module provided in an embodiment of this application.

[0059] For example, the power battery device also includes a bus 510 that connects the individual cells 110 in the cell module 100 in series or in parallel.

[0060] For example, the battery cell module 100 is provided with a total positive output terminal 520 and a total negative output terminal 530.

[0061] Please see Figures 8 to 11 , Figure 8 This is a schematic diagram of the structure of the heat insulation groove cover provided in the embodiment of this application. Figure 9 This is a side view of the power battery device provided in an embodiment of this application. Figure 10 This is a cross-sectional view of the power battery device provided in the embodiments of this application. Figure 11 This is a partially enlarged structural diagram of the power battery device provided in an embodiment of this application; wherein, Figure 9 and Figure 10 correspond, Figure 10 and Figure 11 correspond.

[0062] In some embodiments, the battery cell 110 expands during cycling, and the expansion generated by the two battery cells 110 can be absorbed by the heat insulation groove 220 between the battery cells 110; during charging and discharging, the battery cell 110 generates heat, and the coolant carries away the heat generated by the battery cell 110 through the heat insulation groove 220 between the battery cells 110; in winter, when the temperature of the battery cell 110 is low, the heating liquid heats the battery cell 110 through the heat insulation groove 220 between the battery cells 110; when the battery cell 110 experiences thermal runaway, the heat insulation groove 220 between the battery cells 110 can block the influence of thermal runaway of adjacent battery cells 110, and at the same time, the coolant in the heat insulation groove 220 can carry away the heat, thereby reducing the risk of thermal runaway.

[0063] Please see Figures 12 to 14 , Figure 12 This is a front view structural diagram of the battery cell provided in an embodiment of this application. Figure 13 This is a schematic diagram of the exploded structure of the battery cell provided in an embodiment of this application. Figure 14 This is a schematic diagram of the battery cell structure provided in an embodiment of this application.

[0064] For example, the cell 110 also includes a heat-sealed edge 112, a battery stack 113, and an adapter piece 114; the cell top cover 111 is mounted on the battery stack 113, the heat-sealed edge 112 is disposed at the connection between the cell top cover 111 and the battery stack 113, and the adapter piece 114 is disposed on both sides of the battery stack.

[0065] For example, the battery cell 110 also includes a sealing insulating film 115, which covers the battery stack and is fixedly connected to the heat-sealed edge 112.

[0066] For example, the cell 110 also includes a positive terminal 116 and a negative terminal 117.

[0067] Exemplary, this application provides an electric vehicle, which includes... Figures 1 to 14 The power battery device shown.

[0068] For example, in the power battery device provided in the embodiments of this application, the first water-cooling plate 410 and the second water-cooling plate 420 are connected to the housing 200 by adhesive or other means. The branch water outlets on the water-cooling plates are connected to the cooling / heating water channels (first water channel and second water channel) of the housing 200. With the addition of the heat insulation groove 220, a complete cooling (heating) channel system is formed. During the cycling process, the battery cell 110 expands, and the expansion generated by the two battery cells 110 can be absorbed by the heat insulation grooves 220 between the battery cells 110. During the charging and discharging process, the battery cell 110 generates heat, and the coolant carries away the heat generated by the battery cell 110 through the heat insulation grooves 220 between the battery cells 110. In winter, when the temperature of the battery cell 110 is low, the heating liquid heats the battery cell 110 through the heat insulation grooves 220 between the battery cells 110. When the battery cell 110 experiences thermal runaway, the heat insulation grooves 220 between the battery cells 110 can block the influence of the thermal runaway of adjacent battery cells 110, and at the same time, the coolant in the heat insulation grooves 220 can carry away the heat, thereby reducing the risk of thermal runaway.

[0069] In all embodiments of this application, "large" and "small" are relative terms, "more" and "less" are relative terms, and "upper" and "lower" are relative terms. The embodiments of this application will not elaborate further on the expression of such relative terms.

[0070] It should be understood that the phrases "in this embodiment," "in this application embodiment," or "as an optional implementation" throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in this embodiment," "in this application embodiment," or "as an optional implementation" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0071] In the various embodiments of this application, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0072] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

1. A power battery device, characterized in that, Includes battery cell modules, housing, and multiple heat insulation slot covers; The battery cell module includes multiple battery cells, and each battery cell includes a top cover. The housing is provided with multiple battery cell placement slots, and the multiple battery cells are respectively placed in the multiple battery cell placement slots. A heat insulation slot is provided between two adjacent battery cell placement slots. A first water channel is provided on the first side of the housing, and a second water channel is provided on the second side of the housing. The first water channel and the second water channel are connected through the heat insulation slot. The heat insulation groove cover plate is sealed to the heat insulation groove and the top cover of the battery cell; The power battery device further includes a first water-cooling plate and a second water-cooling plate. The first water-cooling plate is fixedly installed on a first side of the housing and is connected to the first water channel. The second water-cooling plate is fixedly installed on a second side of the housing and is connected to the second water channel. The first water-cooled plate is provided with a water outlet and a tributary water outlet, the water outlet being connected to the tributary water outlet and the tributary water outlet being connected to the first water channel; the second water-cooled plate is provided with a water inlet and a tributary water inlet, the water inlet being connected to the tributary water inlet and the tributary water inlet being connected to the second water channel. The battery cell also includes a heat-sealed edge, a battery stack, and an adapter plate; the top cover of the battery cell is mounted on the battery stack, the heat-sealed edge is located at the connection between the top cover of the battery cell and the battery stack, and the adapter plate is located on both sides of the battery stack; The first water channel and the second water channel are directly connected through the heat insulation groove to form a cooling channel embedded inside the shell; the heat insulation groove cover plate covers the upper opening of the heat insulation groove and is laser welded with the top cover of the battery cell and the shell to form an integrated sealed structure.

2. The power battery device according to claim 1, characterized in that, The housing is provided with a mounting point mechanism on one or the second side.

3. The power battery device according to claim 1, characterized in that, The power battery device also includes a busbar, which connects the individual cells in the cell module in series or in parallel.

4. The power battery device according to claim 3, characterized in that, The battery cell module is provided with a total positive output terminal and a total negative output terminal.

5. The power battery device according to claim 1, characterized in that, The battery cell also includes a sealing insulating film, which covers the battery stack and is fixedly connected to the hot-melt sealing edge.

6. An electric vehicle, characterized in that, The electric vehicle includes a power battery device as described in any one of claims 1 to 5.

Images