Patent Description:
With a development of science and technology, application fields of a secondary battery is more and more extensive. A capacity required for the secondary battery is becoming larger and larger. As the capacity of the secondary battery increases, technology for efficiently cooling heat generated in the secondary battery is also rapidly developing.

The battery module assembly includes a battery module and a cooling component. Usually, thermal adhesive is filled between the battery module and the cooling component to reduce thermal resistance and improve thermal conductivity. In the prior art, thermally conductive slurry is directly spread on the cooling component, and then the battery module is directly placed on the thermally conductive slurry. However, in the battery module assembly manufactured in this way, the battery module has poor heat dissipation performance, which affects a normal use of the battery module.

The document <CIT> discloses a battery module having stable strength and rigidity, high sealability and assemblability, and improved productivity. The battery module comprises a battery unit and a housing with a frame and end plates. An accommodation cavity comprising a thermal bond is formed at the bottom of the battery module as well as a cooling component in form of a cooling plate.

The document <CIT> discloses a battery module comprising a battery cell group, thermally conductive layer including a metal plate, thermally conductive glue, a frame, a glue injection for the thermally conductive slurry.

The document <CIT> discloses a method of manufacturing a battery module, which includes applying a thermal conductive member in form of a thermal conductive adhesive with an injection port.

Embodiments of the present disclosure provide a battery module, a battery module assembly, a production method therefor and an apparatus. The battery module is provided with an injection channel, and thermally conductive slurry injected into an accommodation cavity between the battery module and a cooling component through the injection channel can fully fill the accommodation cavity, thereby improving a heat dissipation efficiency of the battery module.

In an aspect, an embodiment of the present disclosure provides a battery module, comprising a battery unit, a housing for accommodating the battery module, and a thermally conductive slurry. The battery unit comprises a top surface, a bottom surface, and a side surface connecting the top surface and the bottom surface. The housing comprises a limit frame and an injection channel arranged on the limit frame. The limit frame is arranged around the side surface of the battery unit. An accommodation cavity is formed by a bottom of the battery module and a cooling component. The injection channel is configured to be communicated with the accommodation cavity. The thermally conductive slurry is injected into the accommodation cavity from the injection channel. The limit frame comprises an end plate assembly provided at an end of the battery unit, the injection channel is provided in the end plate assembly, the end plate assembly comprises an end plate, an insulation plate, and a connection pipe, at least part of the insulation plate is provided between the end plate and the battery unit, the injection channel penetrates both the end plate and the insulation plate, two ends of the connection pipe are respectively connected to the end plate and the insulation plate, and the injection channel penetrates the end plate, the connection pipe and the insulation plate.

In the battery module of the embodiment of the present disclosure, the injection channel is provided on the limit frame around the battery unit. When the battery module is applied to the battery module assembly, the battery module may be pre-assembled with the cooling component and the accommodation cavity is formed between the bottom of the battery module and the cooling part. Then, the thermally conductive slurry is injected into the accommodation cavity via the injection channel on the limit frame. Since the thermally conductive slurry is injected into the accommodation cavity via the injection channel, the thermally conductive slurry can effectively fill each area of the accommodation cavity under the action of the injection pressure. Thus on one hand it is ensured that the bottom surface of the battery module and the surface of the cooling component can be kept in contact with the thermally conductive slurry, so as to reduce the possibility of a gap appearing between the battery module and the thermally conductive slurry or between the cooling component and the thermally conductive slurry, which is beneficial to improve the heat dissipation effect and heat dissipation efficiency of the battery module.

In another aspect, an embodiment of the present disclosure provides a battery module assembly comprising a cooling component and the battery module as described above. The accommodation cavity is provided between a bottom of the battery module and the cooling component. The injection channel is communicated with the accommodation cavity. The injection channel is used for injecting the thermally conductive slurry into the accommodation cavity. The thermally conductive slurry is used for conducting heat of the battery module to the cooling component.

In another aspect, an embodiment of the present disclosure provides a production method for a battery module assembly, comprising:.

In another aspect, an embodiment of the present disclosure provides an apparatus using a battery module as a power source, comprising the battery module as described above.

Features, advantages, and technical effects of exemplary embodiments of the present disclosure will be described below with reference to the accompanying drawings.

In the drawings, figures are not drawn to actual scale.

Below, implementing ways of the present disclosure will be further described in detail with reference to accompanying drawings and embodiments. The detailed description of the following embodiments and the accompanying drawings are used to illustrate principles of the present disclosure by way of example, but should not be used to limit the scope of the present disclosure, that is, the present disclosure is not limited to the described embodiments. In the description of the present disclosure, it should be noted that, unless otherwise stated, the meaning of "a plurality" and the like is two or more; the orientation or position relation indicated by the terms such as "upper", "lower", "left", "right", "inner", "outer" and the like are only used to conveniently describe the present application and simplify the description, not to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operate in a particular orientation and therefore cannot be understood to be a limitation to the present disclosure. Additionally, the terms "first", "second", "third" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "vertical" is not strictly vertical, but within an allowable range of errors. The term "parallel" is not strictly parallel, but within an allowable range of errors.

Orientation words appearing in the following description are all directions shown in the drawings, and do not limit the specific structure of the present application. In the description of the present disclosure, it should be noted that, unless otherwise stated, the terms "installed", "connected to", "connected with" are to be understood broadly, and may be, for example, a fixed connection, a detachable connection, an integral connection, a direct connection or indirect connection through an intermediate medium. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art according to actual circumstance.

For a better understanding of the present disclosure, embodiments of the present disclosure are described below with reference to <FIG>.

An embodiment of the present disclosure provides an apparatus using a battery module as a power source. The apparatus can be, but is not limited to, a vehicle, a ship, or an aircraft. Referring to <FIG>, an embodiment of the present disclosure provides a vehicle <NUM>, which includes a vehicle body and a battery pack <NUM>. The battery pack <NUM> is provided in the vehicle body. The vehicle <NUM> may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle. The vehicle body is provided with a drive motor electrically connected to the battery pack <NUM>. The battery pack <NUM> supplies power to the drive motor. The drive motor is connected with wheels on the vehicle body via a transmission mechanism, so as to drive the vehicle to travel. Alternatively, the battery pack <NUM> may be horizontally disposed at a bottom of the vehicle body.

Referring to <FIG>, the battery pack <NUM> can be arranged in various ways. In some optional embodiments, the battery pack <NUM> includes a box <NUM> and a battery module assembly disposed in the box <NUM>. The number of battery module assemblies is set as one or more. One or more battery module assemblies are arranged in the box <NUM>. The type of the box <NUM> is not limited. The box <NUM> may be a frame-shaped box, a disc-shaped box, a case-shaped box, or the like. Optionally, the box <NUM> includes a lower box for accommodating the battery module assembly and an upper box covering and enclosing the lower box. After the upper box covers and encloses the lower box, an accommodating portion for accommodating the battery module assembly is formed.

After noticing a problem of poor heat dissipation of the battery module, the applicant conducts research and analysis on various structures of the battery module. The applicant found that there is a gap between the battery module and thermally conductive slurry or between a cooling component and the thermally conductive slurry, resulting in a non-contact state at some parts. Thus a thermal resistance of a position where a non-contact area is located is relatively large, which affects a heat dissipation and consistency of the battery module. After further research, it was found that a way of spreading the thermally conductive slurry on the cooling component and then placing the battery module on the thermally conductive slurry to press the conductive slurry will cause a gap between the battery module and the thermally conductive slurry or between the cooling component and the thermally conductive slurry. This is because there is a difference in a surface flatness of the surface of the battery module or the surface of the cooling component and thus undulating areas appear on surfaces of both the battery module and the cooling component. Thus during the pressing process of the thermally conductive slurry, it cannot be ensured that there is sufficient contact between the battery module and the thermally conductive slurry or between the cooling component and the thermally conductive slurry.

Based on the above problem found by the applicant, the applicant improves the structure of the battery module, and embodiments of the present disclosure are further described below.

Referring to <FIG>, the battery module assembly includes a battery module <NUM>. The battery module <NUM> includes a battery unit <NUM> and a housing <NUM>. The battery unit <NUM> is accommodated in the housing <NUM>. The battery unit <NUM> includes a plurality of secondary batteries <NUM> and a bus bar <NUM> connecting different secondary batteries <NUM> in series or in parallel. The plurality of secondary batteries <NUM> are arranged side by side in one direction. The housing <NUM> includes a limit frame <NUM> and an injection channel <NUM> disposed on the limit frame <NUM>. The limit frame <NUM> encloses the battery unit <NUM> inside the limit frame <NUM>. The battery unit <NUM> has a top surface, a bottom surface, and a side surface connecting the top surface and bottom surface. The limit frame <NUM> is disposed around a side surface of the battery unit <NUM>. The battery module assembly also includes a cooling component <NUM>. The bottom surface of the battery unit <NUM> is disposed toward the cooling component <NUM>. When the battery module <NUM> is applied to the battery module assembly, the battery module <NUM> may be pre-assembled with the cooling component <NUM> and an accommodation cavity <NUM> is formed between a bottom of the battery module <NUM> and the cooling component <NUM>. The injection channel <NUM> provided on the limit frame <NUM> is communicated with the accommodation cavity <NUM>. Then, the thermally conductive slurry is injected into the accommodation cavity <NUM> via the injection channel <NUM> on the limit frame <NUM>. Since the thermally conductive slurry is injected into the accommodation cavity <NUM> via the injection channel <NUM>, the thermally conductive slurry can effectively fill each area of the accommodation cavity <NUM> under an action of an injection pressure. Therefore, on one hand, it can be ensured that the bottom surface of the battery module <NUM> and the surface of the cooling component <NUM> keep in contact with the thermally conductive slurry, which reduces a possibility of a gap appearing between the battery module <NUM> and the thermally conductive slurry or between the cooling component <NUM> and the thermally conductive slurry. It is beneficial to improve a heat dissipation effect and a heat dissipation efficiency of the battery module <NUM>. On the other hand, an accuracy requirement for the flatness of the bottom surface of the battery module <NUM> and the flatness of the surface of the cooling component <NUM> are low. The bottom surface of the battery module <NUM> and the surface of the cooling component <NUM> are allowed to have undulations, so as to reduce processing requirements of the bottom of the battery module <NUM> and the cooling component <NUM>, and reduce the processing difficulty and cost.

In one embodiment, the battery module assembly includes the cooling component <NUM> and the plurality of battery modules <NUM> disposed above the cooling component <NUM>. In this embodiment, by arranging the injection channel <NUM> on the limit frame <NUM> of the battery module <NUM>, the thermally conductive slurry can be injected into the accommodation cavity <NUM> between each battery module <NUM> and the cooling component <NUM> independently, so that the cooling component <NUM> and the box will not to be destroyed and structural integrity of each of the cooling component <NUM> and the box <NUM> is ensured. If the injection channel <NUM> is not provided on the limit frame <NUM>, after the battery module assembly is put into the box <NUM> and assembled to form a battery pack, the injection channel <NUM> needs to be provided on each of the cooling component <NUM> and the box <NUM> at the same time for injecting the thermally conductive slurry in to the accommodation cavity <NUM> formed between the battery module <NUM> and the cooling component <NUM>. However, providing the injection channel <NUM> on the box <NUM> may affect the overall airtightness of the battery pack <NUM>.

Referring to <FIG>, the battery unit <NUM> of the embodiment of the present disclosure has a predetermined height, length and width. The height direction X of the battery unit <NUM> is perpendicular to an arrangement direction of the secondary batteries. The length direction Y of the battery unit <NUM> is the same as the arrangement direction of the secondary batteries. The width direction Z of the battery unit <NUM> is perpendicular to both the height direction X and the length direction Y. Referring to <FIG>, the injection channel <NUM> penetrates the limit frame <NUM> along the height direction X of the battery unit <NUM>. An injection device can be conveniently moved to a top of the battery module <NUM> and aligned with the injection channel <NUM> along the height direction X, which is beneficial to reduce the difficulty of aligning the injection device with the injection channel <NUM>. After the thermally conductive slurry is injected into the injection channel <NUM>, the thermally conductive slurry flows toward the accommodation cavity <NUM> under an action of its own gravity combined with injection pressure, which is beneficial to improve fluidity of the thermally conductive slurry, reduce a possibility of retention of the thermally conductive slurry in the injection channel <NUM>, and improve efficiency of injection work.

In one embodiment, as shown in <FIG>, the limit frame <NUM> includes an end plate assembly <NUM> and a side plate assembly <NUM>. The end plate assembly <NUM> and the side plate assembly <NUM> are connected to each other and alternately arranged around the battery unit <NUM>. The battery unit <NUM> has two ends opposite to each other in the length direction Y of the battery unit <NUM>. The end plate assembly <NUM> is disposed at the end of the battery unit <NUM>. The two side plate assemblies <NUM> are oppositely disposed on two sides of the battery unit <NUM> along the width direction Z of the battery unit <NUM>.

In one embodiment, the injection channel <NUM> is provided in the side plate assembly <NUM>. In the height direction X, the injection channel <NUM> penetrates the side plate assembly <NUM>.

In one embodiment, as shown in <FIG>, the injection channel <NUM> is provided in the end plate assembly <NUM>. A structural feature, such as a reinforcing portion, is usually provided on the end plate assembly <NUM>. The injection channel <NUM> disposed on the end plate assembly <NUM> can be processed and manufactured together with corresponding structural features, and the processing technology is simple. At the same time, the injection channel <NUM> disposed on the corresponding structural features will not occupy additional space, which is beneficial to improve an energy density of the battery module <NUM>. In addition, since the injection channel <NUM> is disposed in the end plate assembly <NUM>, the thickness of the side plate assembly <NUM> can be reduced, which is beneficial to improve the energy density of the battery module <NUM>. In the battery pack <NUM>, two or more battery modules <NUM> are arranged side by side. The respective side plate assemblies <NUM> in two adjacent battery modules <NUM> are arranged adjacently, and the end plate assemblies <NUM> are arranged side by side along the width direction Z, so that a distance between the injection channels <NUM> on respective end plate assemblies <NUM> is relatively large. In this way, when the injection channel <NUM> is arranged on the end plate assembly <NUM>, it is convenient for the injection devices to inject the thermally conductive slurry into the plurality of battery modules <NUM> at the same time, and a positional interference of two adjacent injection devices does not occur, which improves the convenience and efficiency of the injection.

In one embodiment, as shown in <FIG>, <FIG> together, the end plate assembly <NUM> includes an end plate <NUM> and an insulation plate <NUM>. At least part of the insulation plate <NUM> is disposed between the end plate <NUM> and the battery unit <NUM> for isolating the end plate <NUM> and the battery unit <NUM>. The end plate <NUM> of the end plate assembly <NUM> is used for connecting with the side plate assembly <NUM>. The material of the end plate <NUM> may be aluminum, aluminum alloy or steel. The injection channel <NUM> penetrates both the end plate <NUM> and the insulation plate <NUM>. In one example, a portion of the insulation plate <NUM> is disposed between the end plate <NUM> and the battery unit <NUM>, and a portion thereof is located below the end plate <NUM> and serves to isolate the end plate <NUM> from the cooling component <NUM>.

In one embodiment, as shown in <FIG>, <FIG> together, the end plate assembly <NUM> further includes a connection pipe <NUM>. Ends of the connection pipe <NUM> are connected to the end plate <NUM> and the insulation plate <NUM>, respectively. The injection channel <NUM> penetrates the end plate <NUM>, the connection pipe <NUM> and the insulation plate <NUM>. The connection pipe <NUM> has two ends opposite in the height direction X. One end of the connection pipe <NUM> is connected to the end plate <NUM>, and the other end is connected to the insulation plate <NUM>. Since the end plate <NUM> and the insulation plate <NUM> are manufactured separately, it is necessary to make a through hole in the end plate <NUM> to form a part of the injection channel <NUM> and a through hole in the insulation plate <NUM> to form a part of the injection channel <NUM>. In this embodiment, when the end plate <NUM> is connected to the insulation plate <NUM> via the connection pipe <NUM>, the connection pipe <NUM> can compensate for a position error of each of the through hole on the end plate <NUM> and the through hole on the insulation plate <NUM>, thereby reducing a positional accuracy requirement for manufacturing through holes on the end plate <NUM> and the insulation plate <NUM>.

In one embodiment, as shown in <FIG>, the end plate <NUM> has a body portion <NUM> and a first adapter portion <NUM>. The first adapter portion <NUM> is disposed on a side of the body portion <NUM> away from the battery unit <NUM>. At least part of the insulation plate <NUM> is disposed between the body portion <NUM> and the battery unit <NUM>. A through hole is machined on the first adapter portion <NUM> to form a part of the injection channel <NUM>. The connection pipe <NUM> is detachably connected to the first adapter portion <NUM>. Optionally, one end of the connection pipe <NUM> is threadedly connected with the first adapter portion <NUM> or one end of the connection pipe <NUM> is in interference fit with the through hole on the first adapter portion <NUM>. Optionally, one end of the connection pipe <NUM> is connected to the first adapter portion <NUM> in a sealed manner, which reduces a possibility that the thermally conductive slurry overflows from a connection between one end of the connection pipe <NUM> and the first adapter portion <NUM>. In one example, the first adapter portion <NUM> is disposed protruding from the body portion <NUM> and has a strip-shaped structure extending along the height direction X. The through hole on the first adapter portion <NUM> extends along the height direction X. In this way, the thickness of the body portion <NUM> can be reduced, which is beneficial to reduce the overall weight of the end plate assembly <NUM> and improve the energy density of the secondary battery. In one embodiment, as shown in <FIG> and <FIG>, the insulation plate <NUM> includes a second adapter portion <NUM>. The second adapter portion <NUM> is disposed on a side of the insulation plate <NUM> away from the battery unit <NUM>. A portion of the insulation plate <NUM> beyond the body portion <NUM> forms the second transition portion <NUM>. One end of the connection pipe <NUM> is connected to the second adapter portion <NUM>. The injection channel <NUM> penetrates the end plate <NUM>, the connection pipe <NUM> and the second adapter portion <NUM>. Optionally, one end of the connection pipe <NUM> is connected with the second adapter <NUM> in a sealed manner to reduce a possibility that the thermally conductive slurry overflows from a connection between one end of the connection pipe <NUM> and the second adapter portion <NUM>. Optionally, the first adapter portion <NUM> and the second adapter portion <NUM> are disposed correspondingly along the height direction X. The through hole on the first adapter portion <NUM> and the through hole on the second adapter portion <NUM> are disposed correspondingly along the height direction X. In one example, the second adapter portion <NUM> has a receiving portion. One end of the connection pipe <NUM> is accommodated in the receiving portion. In this way, on the one hand, one end of the connection pipe <NUM> is less likely to interfere with an adjacent structural member, reducing a possibility that the connection pipe <NUM> is blocked by the adjacent structural member which results in poor flow of the thermally conductive slurry. On the other hand, the insulation plate <NUM> can limit a movement of the connection pipe <NUM> along its own radial direction, so as to reduce a possibility of loosening due to frequent friction between the connection pipe <NUM> and the insulation plate <NUM>. Optionally, one end of the connection pipe <NUM> received in the receiving portion matches of the receiving portion in shape. One end of the connection pipe <NUM> received in the receiving portion has an inner polygonal hole, which is convenient for inserting a tool into the inner polygonal hole and screwing the connection pipe <NUM>.

In one embodiment, as shown in <FIG> and <FIG> together, the housing <NUM> further includes a discharge channel <NUM>. The discharge channel <NUM> is configured to be communicated with the accommodation cavity <NUM> for discharging the thermally conductive slurry injected into the accommodation cavity <NUM>. During the injection of the thermally conductive slurry, as the thermally conductive slurry is continuously injected, air remaining in the accommodation cavity <NUM> can be discharged via the discharge channel <NUM>, so that the thermally conductive slurry can fully fill the accommodation cavity <NUM> and reduce a possibility that bubbles formed in the thermally conductive slurry affect the thermally conductive efficiency. In addition, the discharge channel <NUM> may serve as a viewing site. An operator can judge whether the accommodation cavity <NUM> is fully filled with the thermally conductive slurry by whether the thermally conductive slurry overflows from the discharge channel <NUM>. After the accommodation cavity <NUM> is fully filled with the thermally conductive slurry, the thermally conductive slurry can overflow from the discharge channel <NUM>, and an injection operation is stopped at this time, thereby reducing unnecessary waste caused by excessive use of the thermally conductive slurry. In one example, the insulation plate <NUM> includes a protrusion <NUM>. The protrusion <NUM> is disposed on a side of the insulation plate <NUM> away from the battery unit <NUM>. The discharge channel <NUM> penetrates the protrusion <NUM> in the height direction X of the battery unit <NUM>. A discharge port of the discharge channel <NUM> is located on an upper surface of the protrusion <NUM> and is higher than the accommodation cavity <NUM>, so as to ensure that the thermally conductive slurry will not overflow from the discharge channel <NUM> until the accommodation cavity <NUM> is fully filled with the thermally conductive slurry. Along the width direction Z of the battery unit <NUM>, the second adapter portion <NUM> and the protrusion <NUM> are spaced apart, thereby increasing a distance between the injection channel <NUM> and the discharge channel <NUM>. In this way, it is possible to reduce a possibility that the thermally conductive slurry injected from the injection channel <NUM> is discharged from the discharge channel <NUM> before the accommodation cavity <NUM> is fully filled which will cause a misjudgment by the operator.

In one embodiment, as shown in <FIG> and <FIG>, the battery module <NUM> further includes a blocking member <NUM>. The blocking member <NUM> is disposed on the housing <NUM>. The housing <NUM>, the blocking member <NUM> and the cooling component <NUM> are configured to form the accommodation cavity <NUM>. After the battery module <NUM> is assembled with the cooling component, in the height direction X, the blocking member <NUM> is located between the housing <NUM> and the cooling component <NUM>. The blocking member <NUM> is arranged around the bottom of the housing <NUM> in a closed form. The blocking member <NUM> can block the thermally conductive slurry, reduce the possibility that the thermally conductive slurry injected into the accommodation cavity <NUM> overflows from the accommodation cavity <NUM> to the outside, improve the utilization rate of the thermally conductive slurry, and reduce unnecessary waste caused by excessive use of the thermally conductive slurry. In one example, the blocking member <NUM> has an integrally formed annular structure. The blocking member <NUM> also has a flexible structure and itself has elastic deformation ability. The housing <NUM> and the cooling component <NUM> can jointly apply a pressing stress to the blocking member <NUM>, so as to further improve the sealing between the blocking member <NUM> and the housing <NUM> and between the blocking member <NUM> and the cooling component <NUM>. Optionally, the material of the blocking member <NUM> may be rubber or silicone.

In one embodiment, as shown in <FIG> and <FIG>, the limit frame <NUM> is provided with a boss <NUM>. The blocking member <NUM> is located inside the boss <NUM>, and an opening of the injection channel <NUM> and an opening of the discharge channel <NUM> are located inside the blocking member <NUM>. The boss <NUM> is used to limit a position of the blocking member <NUM>. The boss <NUM> can form a constraining limit for the blocking member <NUM> from the outside of the blocking member <NUM>, so as to reduce a possibility that the blocking member <NUM> itself is expanded outward due to pressing stress and is offset in position. In one example, a surface of the insulation plate <NUM> away from the end plate <NUM> is provided with the boss <NUM>.

In one embodiment, as shown in <FIG>, the housing <NUM> further includes a bottom plate <NUM>. The battery unit <NUM> is disposed on and supported by the bottom plate <NUM>. The blocking member <NUM> is disposed on a side of the bottom plate <NUM> away from the battery unit <NUM>. The bottom plate <NUM>, the blocking member <NUM> and the cooling component <NUM> form the accommodation cavity <NUM>. The bottom plate <NUM> is connected fixedly to the limit frame <NUM>. In another embodiment, as shown in <FIG>, the housing <NUM> further includes a top plate <NUM>. The top plate <NUM> is connected fixedly with the limit frame <NUM>, so that the top plate <NUM> , the bottom plate <NUM> and the limit frame <NUM> enclose the battery unit <NUM>.

Referring to <FIG> and <FIG>, an embodiment of the present disclosure provides a battery module assembly, which includes the cooling component <NUM> and the battery module <NUM>.

In the height direction X, the cooling component <NUM> is disposed below the battery module <NUM>. The cooling component <NUM> is used to cool the battery module <NUM>. The accommodation cavity <NUM> is provided between the bottom of the battery module <NUM> and the cooling component <NUM>. The injection channel <NUM> is communicated with the accommodation cavity <NUM>. The injection channel <NUM> is used to inject the thermally conductive slurry into the accommodation cavity <NUM>.

The heat of the battery module <NUM> may be conducted to the cooling component <NUM> via the thermally conductive slurry. Since the thermally conductive slurry is injected into the accommodation cavity <NUM> via the injection channel <NUM> on the limiting frame <NUM>, it can be ensured that the accommodation cavity <NUM> is fully filled with the thermally conductive slurry under the condition that each of the bottom surface of the battery module <NUM> and the surface of the cooling component <NUM> has a difference in flatness. Therefore, it is difficult to leave a gap between the battery module <NUM> and the thermally conductive slurry and between the cooling component <NUM> and the thermally conductive slurry, but instead they are in a good contact state, thereby ensuring a good heat dissipation effect of the battery module assembly itself.

An embodiment of the present disclosure provides a production method for a battery module assembly, which includes:.

In the production method for the battery module assembly of the embodiment of the present disclosure, the accommodation cavity <NUM> formed between the battery module <NUM> and the cooling component <NUM> can be fully filled with the thermally conductive slurry via the injection channel <NUM>, so that a good contact state is kept between the battery module <NUM> and the thermally conductive slurry and between the cooling component <NUM> and the thermally conductive slurry and thus the battery module assembly itself is ensured to have a good heat dissipation effect.

Claim 1:
A battery module (<NUM>), comprising:
a battery unit (<NUM>) comprising a top surface, a bottom surface, and a side surface connecting the top surface and the bottom surface;
a housing (<NUM>) for accommodating the battery unit (<NUM>), wherein the housing (<NUM>) comprises a limit frame (<NUM>) and an injection channel (<NUM>) arranged on the limit frame (<NUM>), the limit frame (<NUM>) is arranged around the side surface of the battery unit (<NUM>); an accommodation cavity (<NUM>) is formed by a bottom of the battery module (<NUM>) and a cooling component (<NUM>), and the injection channel (<NUM>) is configured to be communicated with the accommodation cavity (<NUM>); and
thermally conductive slurry which is injected into the accommodation cavity (<NUM>) from the injection channel (<NUM>), wherein
the limit frame (<NUM>) comprises an end plate assembly (<NUM>) provided at an end of the battery unit (<NUM>), the injection channel (<NUM>) is provided in the end plate assembly (<NUM>), the end plate assembly (<NUM>) comprises an end plate (<NUM>), an insulation plate (<NUM>), and a connection pipe (<NUM>), at least part of the insulation plate (<NUM>) is provided between the end plate (<NUM>) and the battery unit (<NUM>), the injection channel (<NUM>) penetrates both the end plate (<NUM>) and the insulation plate (<NUM>), two ends of the connection pipe (<NUM>) are respectively connected to the end plate (<NUM>) and the insulation plate (<NUM>), and the injection channel (<NUM>) penetrates the end plate (<NUM>), the connection pipe (<NUM>) and the insulation plate (<NUM>).