CN217485676U - Battery device and electric vehicle based on chassis integration - Google Patents

Abstract

The embodiment of the application provides a battery device and an electric vehicle based on chassis integration, and relates to the technical field of battery thermal management. The chassis-based integrated battery device comprises a chassis and a battery cell component; the chassis comprises a system circuit mechanism and a plurality of battery cell groove lattices, the battery core assembly comprises a plurality of battery cells, and the battery cells are arranged in the battery cell groove lattices in a one-to-one correspondence manner; the battery core is provided with a plurality of polar columns, a first magnetic component is arranged in each polar column, the system circuit mechanism is provided with a plurality of second magnetic components, the second magnetic components are controlled to be connected with or disconnected from the corresponding first magnetic components according to the magnetism of the second magnetic components, the system circuit mechanism is electrically connected with the second magnetic components, and the system circuit mechanism is used for adjusting the magnetism of the second magnetic components. The battery device based on the chassis integration can achieve the technical effect of preventing the thermal runaway of the battery.

Description

Battery device and electric vehicle based on chassis integration

Technical Field

The application relates to the technical field of battery thermal management, in particular to a battery device based on chassis integration and an electric vehicle.

Background

At present, a battery pack of an electric vehicle is composed of a plurality of batteries stacked in series; for a typical battery pack having about 96 cells, such a battery pack can produce a total voltage in excess of 400V for a lithium ion cell charged to 4.2V. Although the automotive power supply system considers the battery pack as a single high-voltage battery, charging and discharging the entire battery pack each time, the battery control system must consider the condition of each battery independently. If one cell in the battery pack has a slightly lower capacity than the other cells, its state of charge will gradually deviate from the other cells over a number of charge/discharge cycles. If the state of charge of this cell is not periodically balanced with the other cells, it will eventually enter a deep discharge state, resulting in damage and ultimately battery pack failure. To prevent this from happening, the voltage of each battery must be monitored to determine the state of charge.

In the prior art, when a battery pack fails, thermal runaway can be caused, the whole battery pack is damaged, and the whole battery system is subjected to fire and explosion; several technologies for preventing heat spreading exist at present, and the technologies are mainly passive. However, the thermal management efficiency of the battery is low due to the fact that the thermal spreading is prevented by the heat-insulating high-temperature-resistant material and the heat is taken away in a heat exchange mode, and the problems of thermal runaway of the battery and even fire explosion of the battery are easily caused.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide a battery device and an electric vehicle based on chassis integration, can realize preventing the technological effect of battery thermal runaway.

In a first aspect, an embodiment of the present application provides a chassis-based integrated battery device, which includes a chassis and a battery cell assembly;

the chassis comprises a system circuit mechanism and a plurality of battery cell lattices, the battery core assembly comprises a plurality of battery cells, and the battery cells are arranged in the battery cell lattices in a one-to-one correspondence manner;

the battery core is provided with a plurality of pole columns, a first magnetic component is arranged in each pole column, the system circuit mechanism is provided with a plurality of second magnetic components, the second magnetic components are controlled to be connected with or disconnected from the corresponding first magnetic components according to the magnetism of the second magnetic components, the system circuit mechanism is electrically connected with the second magnetic components, and the system circuit mechanism is used for adjusting the magnetism of the second magnetic components.

In the implementation process, the battery device based on the chassis integration enables the surface of the pole column to be attached to the system circuit mechanism through the fact that the first magnetic member in the pole column and the second magnetic member of the system circuit mechanism attract each other when magnetism is different, and electric connection between the battery cell and the system circuit mechanism is achieved; when a certain electric core in the electric core assembly is out of control thermally, the system circuit mechanism adjusts the magnetism of the second magnetic component through the control circuit, so that the magnetism of the first magnetic component is the same as that of the second magnetic component, the first magnetic component and the second magnetic component are mutually repulsive, the electric core out of control thermally pops up the battery system, the thermal out-of-control of the whole electric core assembly is avoided, and the safety of the battery system and the safety of vehicles are ensured; therefore, the technical effect of preventing the thermal runaway of the battery can be achieved by the chassis-based integrated battery device.

Further, the pole is a male pole, and the male pole is arranged at the bottom of the battery cell and protrudes out of the bottom plane of the battery cell.

In the implementation process, the terminal posts are set to be the convex terminal posts, the battery cell can be electrically connected with the system circuit mechanism through the convex terminal posts, large-area contact between the battery cell and the system circuit mechanism is avoided, and the speed of the battery cell thermal spreading to the system circuit mechanism out of thermal runaway is reduced.

Further, the device also comprises a plurality of battery cell explosion-proof valves, and the battery cell explosion-proof valves are arranged between the system circuit mechanism and the battery cells.

In the implementation process, the battery cell explosion-proof valve is used as a pressure relief device of the battery cell out of control due to heat, so that the battery cell out of control due to heat is prevented from exploding.

Further, the device further comprises a plurality of elastic mechanisms, and the elastic mechanisms are arranged between the system circuit mechanism and the battery core.

In the implementation process, when the magnetism of the first magnetic member is opposite to that of the second magnetic member, the first magnetic member is connected with the second magnetic member, and the elastic mechanism is in a compressed state; when the magnetism of the first magnetic member is the same as that of the second magnetic member, the first magnetic member and the second magnetic member repel each other and are disconnected from each other, and the battery cell is ejected out under the action of the elastic mechanism.

Furthermore, the system circuit mechanism is provided with a plurality of protruding platforms, and the elastic mechanism is installed on the corresponding protruding platforms.

In the implementation process, the distance between the bottom plane of the battery cell and the top plane of the system circuit mechanism is increased by arranging the protruding platform, so that the speed of thermally spreading the battery cell out of control to the system circuit mechanism is further reduced.

Further, the device further comprises a plurality of pressure sensors, the pressure sensors are installed in the system circuit mechanism, and the pressure sensors are used for detecting the gas pressure of the corresponding battery cells.

In the above-mentioned realization process, through the inside gas pressure of pressure sensor monitoring electricity core, when the internal pressure of electricity core reached certain degree, and pressure growth rate was unusual, battery system judged whether there is the thermal runaway risk in electricity core through discernment pressure sensor's data, if there is the magnetism that the risk then can control second magnetic component, popped out electric core.

Further, the device also comprises a plurality of temperature sensors, the temperature sensors are installed in the system circuit mechanism, and the temperature sensors are used for detecting the gas temperature of the corresponding battery cells.

In the above-mentioned realization process, through the inside temperature of temperature sensor monitoring electricity core, when the temperature of electricity core is unusual, then can control the magnetism of second magnetism component, pop out electric core, prevent electric core thermal runaway.

Further, the device also comprises a guard plate, and the guard plate is arranged above the battery cell and the battery cell groove lattice.

In the implementation process, the battery cell is hermetically installed in the battery cell groove grid by the guard plate, so that the protection effect is achieved.

Further, the guard plate is bonded with the battery cell and the battery cell groove lattice through structural adhesive.

In a second aspect, embodiments of the present application provide an electric vehicle including a chassis-based integrated battery device according to any one of the first aspect.

Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the above-described techniques.

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a chassis-based integrated battery device according to an embodiment of the present disclosure;

fig. 2 is a schematic cross-sectional structural diagram of a chassis-based integrated battery device according to an embodiment of the present disclosure;

fig. 3 is a schematic cross-sectional view of a first part of a chassis-based integrated battery device according to an embodiment of the present disclosure;

fig. 4 is a schematic cross-sectional view of a second part of a chassis-based integrated battery device provided in an embodiment of the present application;

fig. 5 is a schematic cross-sectional view of a third part of a chassis-based integrated battery device according to an embodiment of the present application;

fig. 6 is a schematic cross-sectional view of a fourth part of a chassis-based integrated battery device according to an embodiment of the present application.

Icon: a chassis 100; a system circuit mechanism 110; a second magnetic member 111; a cell slot grid 120; an electric core assembly 200; a battery cell 210; a pole 211; a first magnetic member 212; a cell explosion-proof valve 310; an elastic mechanism 320; a pressure sensor 330; and an apron 400.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as the case may be.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or a point connection; either directly or indirectly through intervening media, or may be an internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.

The embodiment of the application provides a chassis integration-based battery device and an electric vehicle, which can be applied to a CTC technology of a power battery; according to the chassis-integration-based battery device, the first magnetic component in the pole and the second magnetic component of the system circuit mechanism are attracted when the magnetism is different, so that the surface of the pole is attached to the system circuit mechanism, and the electric core is electrically connected with the system circuit mechanism; when a certain electric core in the electric core assembly is out of control, the system circuit mechanism adjusts the magnetism of the second magnetic component through the control circuit, so that the magnetism of the first magnetic component is the same as that of the second magnetic component, and the first magnetic component and the second magnetic component are mutually repulsive, the electric core out of control is popped out of the battery system, the thermal out-of-control of the whole electric core assembly is avoided, and the safety of the battery system and the safety of a vehicle are ensured; therefore, the battery device based on chassis integration can prevent the technical effect of thermal runaway of the battery.

Exemplarily, integration of the battery with the automobile Chassis, also known as structural battery (CTC) technology; the technical essence of the CIC is that most of modules inside a battery pack are cancelled, a battery core or a module is directly installed on a chassis of a vehicle body, and the battery core supplies power to the vehicle and also serves as a structural member of the chassis.

Referring to fig. 1 to fig. 3, fig. 1 is a schematic structural diagram of a battery device based on chassis integration provided in an embodiment of the present application, fig. 2 is a schematic sectional structural diagram of the battery device based on chassis integration provided in the embodiment of the present application, fig. 3 is a schematic sectional structural diagram of a first portion of the battery device based on chassis integration provided in the embodiment of the present application, a section a-a in fig. 1 corresponds to fig. 2, and a section B in fig. 2 corresponds to fig. 3; the chassis-based integrated battery device includes a chassis 100 and a battery cartridge assembly 200.

Illustratively, the chassis 100 includes a system circuit mechanism 110 and a plurality of cell slots 120, the battery pack assembly 200 includes a plurality of battery cells 210, and the plurality of battery cells 210 are mounted in the plurality of cell slots 120 in a one-to-one correspondence.

Illustratively, the battery cell 210 is provided with a plurality of pole posts 211, a first magnetic member 212 is provided in each pole post 211, the system circuit mechanism 110 is provided with a plurality of second magnetic members 111, the connection or disconnection of the second magnetic members 111 and the corresponding first magnetic members 212 is controlled according to the magnetism of the second magnetic members 111, the system circuit mechanism 110 is electrically connected with the second magnetic members 111, and the system circuit mechanism 110 is used for adjusting the magnetism of the second magnetic members 111.

Illustratively, the first magnetic member 212 includes a magnetic substance therein, the second magnetic member 111 also includes a magnetic substance therein, and the magnetism of the second magnetic member 111 can be controlled by the system circuit mechanism 110; when the magnetism of the first magnetic member 212 and the magnetism of the second magnetic member 111 are opposite, the first magnetic member 212 and the second magnetic member 111 are connected, so that the electrical connection between the system circuit mechanism 110 and the battery cell 210 is realized; when the first magnetic member 212 and the second magnetic member 111 have the same magnetism, the first magnetic member 212 and the second magnetic member 111 repel each other, and are disconnected from each other, so that the system circuit mechanism 110 and the battery cell 210 are disconnected, and the battery cell 210 is ejected out of the cell compartment 120.

In some embodiments, the system circuitry 110 includes system circuitry of the vehicle, such as various control circuits, power lines, and the like.

In some embodiments, the chassis-based integrated battery device is characterized in that the first magnetic member 212 in the pole 211 and the second magnetic member 111 of the system circuit mechanism 110 are attracted when the magnetism is different, so that the surface of the pole 211 is attached to the system circuit mechanism 110, and the electric core 210 is electrically connected to the system circuit mechanism 110; when a certain electric core 210 in the electric core assembly 200 is in thermal runaway, the system circuit mechanism 110 adjusts the magnetism of the second magnetic member 111 through the control circuit, so that the magnetism of the first magnetic member 212 is the same as that of the second magnetic member 111, and the first magnetic member 212 and the second magnetic member 111 repel each other, so that the electric core 210 in thermal runaway pops up the battery system, the thermal runaway of the whole electric core assembly 200 is avoided, and the safety of the battery system and the safety of a vehicle are ensured; therefore, the battery device based on chassis integration can prevent the technical effect of thermal runaway of the battery.

Illustratively, the pole 211 is a male pole disposed at the bottom of the cell 210 and protruding out of the bottom plane of the cell 210.

Exemplarily, the terminal 211 is set to be a male terminal, and the battery cell 210 can be electrically connected to the system circuit mechanism 110 through the male terminal, so as to avoid a large-area contact between the battery cell 210 and the system circuit mechanism 110, and reduce a speed of thermally spreading the battery cell 210 out of thermal control to the system circuit mechanism 110.

Referring to fig. 4, fig. 4 is a schematic cross-sectional view of a second part of a chassis-based integrated battery device according to an embodiment of the present application, where a portion C in fig. 2 corresponds to fig. 4.

Illustratively, the chassis-based integrated battery device further includes a plurality of cell explosion-proof valves 310, and the cell explosion-proof valves 310 are disposed between the system circuit mechanism 110 and the cells 210.

Illustratively, the cell explosion-proof valve 310 serves as a pressure relief device for the cell 210 in thermal runaway, and prevents the cell 210 in thermal runaway from exploding.

Referring to fig. 5, fig. 5 is a schematic cross-sectional view of a third portion of a chassis-based integrated battery device according to an embodiment of the present disclosure, where a portion D in fig. 2 corresponds to fig. 5.

Illustratively, the chassis-based integrated battery device further includes a plurality of elastic mechanisms 320, and the elastic mechanisms 320 are disposed between the system circuit mechanism 110 and the battery cells 220.

Illustratively, when the magnetism of the first magnetic member 212 and the second magnetic member 111 is opposite, the first magnetic member 212 and the second magnetic member 111 are connected, and the elastic mechanism 320 is in a compressed state; when the magnetism of the first magnetic member 212 and the magnetism of the second magnetic member 111 are the same, the first magnetic member 212 and the second magnetic member 111 repel each other, the first magnetic member 212 and the second magnetic member 111 are disconnected, and the battery cell 210 is ejected under the action of the elastic mechanism 320.

In some embodiments, as shown in fig. 5, when the first magnetic member 212 and the second magnetic member 111 are connected, that is, when the elastic mechanism 320 is in a compressed state, the elastic mechanism 320 is embedded in the bottom plane of the battery cell 110 by an embedding distance X.

Illustratively, the resilient mechanism 320 may be a resilient leaf spring, a spring, or the like, by way of example only and not limitation.

Illustratively, the system circuit mechanism 110 is provided with a plurality of raised platforms, and the resilient mechanism 320 is mounted on the corresponding raised platforms.

Exemplarily, by providing the protruding platform, a distance between a bottom plane of the battery cell 210 and a top plane of the system circuit mechanism 110 is increased, so as to further reduce a speed at which the thermal runaway battery cell 210 thermally spreads to the system circuit mechanism 110.

Illustratively, the chassis-based integrated battery device further includes a plurality of pressure sensors 330, the plurality of pressure sensors 330 are installed in the system circuit mechanism 110, and the pressure sensors 330 are configured to detect gas pressures of the corresponding battery cells 210.

For example, the pressure sensor 330 is used to monitor the gas pressure inside the battery cell 210, and when the internal pressure of the battery cell 210 reaches a certain level and the pressure increase rate is relatively abnormal, the battery system identifies data of the pressure sensor 330 to determine whether the battery cell 210 is at risk of thermal runaway, and if there is a risk, the magnetism of the second magnetic member 111 may be controlled to eject the battery cell 210.

Illustratively, the chassis-based integrated battery device further includes a plurality of temperature sensors installed in the system circuit mechanism 110, and the temperature sensors are configured to detect gas temperatures of the corresponding battery cells 210.

Illustratively, the temperature inside the battery cell 210 is monitored by a temperature sensor, and when the temperature of the battery cell 210 is abnormal, the magnetism of the second magnetic member 111 may be controlled to eject the battery cell 210, so as to prevent the battery cell 210 from thermal runaway.

Referring to fig. 6, fig. 6 is a schematic cross-sectional view of a fourth portion of a chassis-based integrated battery device according to an embodiment of the present application, where a portion E in fig. 2 corresponds to fig. 6.

Illustratively, the chassis-based integrated battery device further includes a guard plate 400, and the guard plate 400 is mounted above the battery cell 210 and the cell compartment 120.

Illustratively, the cover sheet 400 seals the battery cell 210 in the cell compartment 120 for protection.

Illustratively, the cover sheet 400 is bonded to the battery cell 210 and the battery cell compartment 120 by structural adhesive.

In some embodiments, the present embodiments provide an electric vehicle including a chassis-based integrated battery apparatus as in fig. 1-6.

For example, the chassis-integrated battery device provided in the embodiment of the present application is a mode of a CTC technology, where a battery cell 210 is placed in a battery cell lattice 120, a magnetic substance of a terminal 211 and a magnetic substance of a system circuit mechanism 110 are attracted to each other to achieve electrical connection, an elastic mechanism 320 is in a compressed state, and a guard plate 400 is bonded to the battery cell 210 and a vehicle body through structural adhesive.

For example, by using the principle that the magnetic substance of the terminal 211 and the magnetic substance of the system circuit mechanism 110 attract each other due to different magnetism, the surface of the terminal 211 and the surface of the system circuit mechanism 110 are bonded together to achieve electrical connection, and the laser welding connection between the terminal 211 of the battery cell 210 and the system circuit mechanism 110 may be eliminated.

Illustratively, when a certain electric core 210 of the electric core assembly 200 is thermally runaway, the system circuit mechanism 110 adjusts the magnetism of the magnetic substance electrically connected to the system through the control circuit, so that the magnetic substance of the pole 211 and the magnetic substance of the system circuit mechanism 110 repel each other in phase, and in addition, the repulsive force generated by the elastic mechanism 320 causes the thermal runaway electric core 210 to pop out of the battery system, thereby ensuring the safety of the battery system and the safety of vehicles.

Illustratively, monitoring of the gas pressure inside the cell 210 is achieved by the pressure sensor 330; cell 210 is in long-term use process or circulation process, because positive negative pole can produce the side reaction with electrolyte, lead to the inside gas pressure of cell 210 constantly to rise, when inside thermal runaway takes place for cell 210, also can produce a large amount of gases, lead to unable release pressure in the short time, and cause cell 210 explosion phenomenon, through the inside gas pressure of pressure sensor 330 monitoring cell 2120, when the inside pressure certain degree of cell 210, and pressure increase rate is unusual, battery system can be through judging discernment, whether cell 210 has the thermal runaway risk, if there is, will launch this cell 210 out, if do not, will request commands such as derating.

For example, in the chassis-based integrated battery device provided by the embodiment of the present application, two magnetic substances attract each other through the difference of magnetism, and thus, electrical connection can be achieved; through the same magnetism and the repulsion of two magnetic substances, the thermal runaway cell 210 can be separated from the vehicle body, so that the thermal spreading is actively prevented; the thermal runaway cell 210 is separated from the vehicle body by the compression rebound force of the elastic mechanism 320; the internal pressure of the battery cell 210 is monitored in real time through the pressure sensor 330, so that the health degree of the battery cell 210 and whether thermal runaway occurs are judged, and a basis is provided for a battery management system.

In all embodiments of the present application, the terms "large" and "small" are relatively speaking, and the terms "upper" and "lower" are relatively speaking, so that descriptions of these relative terms are not repeated herein.

It should be appreciated that reference throughout this specification to "in this embodiment," "in an embodiment of the present application," or "as an alternative implementation" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in this embodiment," "in the examples of the present application," or "as an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Those skilled in the art should also appreciate that the embodiments described in this specification are all alternative embodiments and that the acts and modules involved are not necessarily required for this application.

In various embodiments of the present application, it should be understood that the size of the serial number of each process described above does not mean that the execution sequence is necessarily sequential, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A chassis-based integrated battery device is characterized by comprising a chassis and a battery core assembly;

the chassis comprises a system circuit mechanism and a plurality of battery cell groove lattices, the battery core assembly comprises a plurality of battery cells, and the battery cells are arranged in the battery cell groove lattices in a one-to-one correspondence manner;

the battery core is provided with a plurality of polar columns, a first magnetic component is arranged in each polar column, the system circuit mechanism is provided with a plurality of second magnetic components, the second magnetic components are controlled to be connected with or disconnected from the corresponding first magnetic components according to the magnetism of the second magnetic components, the system circuit mechanism is electrically connected with the second magnetic components, and the system circuit mechanism is used for adjusting the magnetism of the second magnetic components.

2. The chassis-integration-based battery device of claim 1, wherein the post is a male post disposed at the bottom of the cell and protruding out of the bottom plane of the cell.

3. The chassis-integrated battery device of claim 1, further comprising a plurality of cell explosion-proof valves disposed between the system circuitry and the cells.

4. The chassis-integrated battery device of claim 1, further comprising a plurality of resilient mechanisms disposed between the system circuit mechanism and the cell.

5. The chassis-based integrated battery apparatus of claim 4, wherein the system circuit mechanism is provided with a plurality of raised platforms, and the elastic mechanism is mounted on the corresponding raised platforms.

6. The chassis-integrated battery device according to claim 1, further comprising a plurality of pressure sensors mounted within the system circuitry, the pressure sensors configured to detect gas pressure of the corresponding cells.

7. The chassis-integrated battery device according to claim 1, further comprising a plurality of temperature sensors mounted within the system circuitry, the temperature sensors configured to detect gas temperatures of the corresponding cells.

8. The chassis-integrated battery device of claim 1, further comprising a guard plate mounted over the cell and the cell bay.

9. The chassis-integrated battery device of claim 8, wherein the guard plate is bonded to the cell and the cell grid by a structural adhesive.

10. An electric vehicle characterized by comprising the chassis-based integrated battery device according to any one of claims 1 to 9.

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