Battery module and automobile

Abstract

The utility model provides a battery module and an automobile, and relates to the technical field of batteries. The battery module comprises a shell, a battery cell stacking body, a positioning plate, a first heat-conducting glue layer and a heating piece, the battery core stacking body is arranged in the accommodating cavity of the shell, so that the shell can achieve the purpose of protecting the battery core stacking body. The positioning plate is opposite to the battery cell stacking body, and the first heat-conducting glue layer is respectively bonded with the positioning plate and the battery cell stacking body, so that the positioning plate can be fixed with the battery cell stacking body, the positioning plate can play a role in positioning and fixing the battery cell stacking body, and the structure of the battery cell stacking body is stable. The positioning plate can heat the first heat-conducting glue layer, so that the temperature of the first heat-conducting glue layer can be increased, the curing stability of the first heat-conducting glue layer is improved, and the curing efficiency of the first heat-conducting glue layer can be improved. Therefore, when the battery module is prepared, the positioning plate can be more efficiently bonded and fixed with the battery cell stack, and the preparation efficiency of the battery module is higher.

Description

Technical Field

[0001] The present application relates to a battery module and a car, belonging to the technical field of batteries. Background Art

[0002] In order to improve the integration efficiency of the battery module, the current battery module adopts a large module structure with multiple battery cells stacked, which can increase the capacity of the battery module. Correspondingly, the volume and weight of the battery module will also increase. In order to make the structure of the battery module stable, the side wall of the battery module can be provided with a positioning plate structure for fixing multiple battery cells, and the positioning plate and the multiple battery cells can be fixed by bonding with a thermally conductive structural adhesive.

[0003] Currently, on the battery module production line, in order to make the positioning plate and the side wall of the battery module bond more efficiently, the thermally conductive structural adhesive can be heated by an external heating device to improve the curing and bonding efficiency of the thermally conductive structural adhesive. However, this also requires the design of corresponding tooling so that the external heating device can cooperate with the battery module for heating, resulting in lower production efficiency and higher cost of the battery production line. Utility Model Content

[0004] The present application provides a battery module and a car, which solves the problem of inconvenient curing of thermal conductive structural adhesive of the battery module in the related art.

[0005] In a first aspect, the present application provides a battery module, comprising:

[0006] A housing having a cavity;

[0007] A battery cell stack is disposed in the cavity;

[0008] A positioning plate, arranged opposite to the outer wall of the battery cell stack;

[0009] A first thermally conductive adhesive layer is disposed between the battery cell stack and the positioning plate, and opposite sides of the first thermally conductive adhesive layer are respectively bonded to the battery cell stack and the positioning plate;

[0010] A heating element is disposed on the positioning plate, and the heating element is configured to heat the first thermally conductive adhesive layer.

[0011] In some embodiments, the positioning plate has a mounting cavity therein, and the heating element is disposed in the mounting cavity.

[0012] In some embodiments, a second thermally conductive adhesive layer is further included, and the second thermally conductive adhesive layer is arranged between the heating element and the positioning plate. The opposite sides of the second thermally conductive adhesive layer are respectively bonded to the heating element and the positioning plate, and the heating element is further configured to heat the second thermally conductive adhesive layer.

[0013] In some embodiments, an insulating film is further included, wherein the insulating film covers a side of the positioning plate facing away from the heating portion, and the positioning plate is a metal part.

[0014] In some embodiments, a positioning ear is provided on a side of the positioning plate facing away from the battery cell stack, and the positioning ear is fixed to the shell.

[0015] In some embodiments, the thermal conductivity of the first thermally conductive adhesive layer is 0.5-5.

[0016] In some embodiments, the heating element includes a plurality of heating cores and a ceramic sheet, the plurality of heating cores and the plurality of ceramic sheets are alternately arranged along the length direction of the battery cell stack, the plurality of heating cores are electrically connected, and the heating core is a thermistor heater.

[0017] In some embodiments, the battery cell stack includes a battery cell portion and a separator, the battery cell portion is multiple in number, the multiple battery cell portions are stacked along a thickness direction of the battery cell portion, and the separator is disposed between adjacent battery cell portions.

[0018] In some embodiments, it also includes an integrated tray, an upper cover and an end plate, wherein the integrated tray is arranged on the top of the battery cell stack, the upper cover is arranged on the integrated tray, and the end plates are arranged on both sides of the battery cell stack along the stacking direction of the multiple battery cells in the battery cell stack, the number of the positioning plates and the heating elements is two, the two positioning plates are arranged in a one-to-one correspondence with the two heating elements, and the two positioning plates are arranged on both sides of the battery cell stack along a direction perpendicular to the stacking direction of the multiple battery cells in the battery cell stack.

[0019] In a second aspect, based on the above battery module, the present application provides a car, comprising the above battery module.

[0020] In the battery module provided by the present application, the battery cell stack is arranged in the cavity of the shell, so that the shell can serve the purpose of protecting the battery cell stack. The positioning plate is opposite to the battery cell stack, and the first thermally conductive adhesive layer is respectively bonded to the positioning plate and the battery cell stack, so that the positioning plate can be fixed to the battery cell stack, so that the positioning plate can play a role in positioning and fixing the battery cell stack, so that the structure of the battery cell stack is stable. In this way, the structure can be kept stable during the movement of the battery cell stack. The positioning plate can heat the first thermally conductive adhesive layer, so that the temperature of the first thermally conductive adhesive layer can be increased, thereby improving the curing stability of the first thermally conductive adhesive layer, and then improving the curing efficiency of the first thermally conductive adhesive layer. In this way, when preparing the battery module, the positioning plate can be more efficiently bonded and fixed to the battery cell stack, thereby improving the preparation efficiency of the battery module.

[0021] The heat generated by the heating element can also be conducted to the battery cell stack through the first thermally conductive adhesive layer, so that when the temperature of the battery cell stack is low, the battery cell stack can be heated, so that the battery cell stack has better performance.

[0022] In the automobile proposed in the present application, the manufacturing efficiency of the automobile can be improved due to the application of the above-mentioned battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other purposes, features and advantages of the embodiments of the present application will become more easily understood through the following detailed description with reference to the accompanying drawings. In the accompanying drawings, multiple embodiments of the present application will be described in an exemplary and non-limiting manner, wherein:

[0024] Figure 1 A schematic diagram of a battery module according to an embodiment of the present application;

[0025] Figure 2 A schematic diagram of a positioning plate of a battery module according to an embodiment of the present application;

[0026] Figure 3 Schematic diagram of a positioning plate and a heating element of a battery module according to an embodiment of the present application.

[0027] Reference numerals:

[0028] 100 - battery cell stack, 110 - battery cell portion, 120 - separator,

[0029] 200-positioning plate, 210-installation cavity, 220-insulating film, 230-positioning ear,

[0030] 300- first thermal conductive adhesive layer,

[0031] 400-heating element, 410-heating core, 420-ceramic sheet, 430-wire,

[0032] 500-end plate,

[0033] 600-Integrated Tray,

[0034] 700-Top cover. DETAILED DESCRIPTION

[0035] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0036] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0041] In order to improve the integration efficiency of the battery module, the current battery module adopts a large module structure with multiple battery cells stacked, which can increase the capacity of the battery module. Correspondingly, the volume and weight of the battery module will also increase. In order to make the structure of the battery module stable, the side wall of the battery module can be provided with a positioning plate structure for fixing multiple battery cells, and the positioning plate and the multiple battery cells can be fixed by bonding with a thermally conductive structural adhesive.

[0042] Currently, on the battery module production line, in order to make the positioning plate and the side wall of the battery module bond more efficiently, the thermally conductive structural adhesive can be heated by an external heating device to improve the curing and bonding efficiency of the thermally conductive structural adhesive. However, this also requires the design of corresponding tooling so that the external heating device can cooperate with the battery module for heating, resulting in lower production efficiency and higher cost of the battery production line.

[0043] In the battery module proposed in the present application, the battery cell stack is arranged in the cavity of the shell, so that the shell can serve the purpose of protecting the battery cell stack. The positioning plate is opposite to the battery cell stack, and the first thermally conductive adhesive layer is respectively bonded to the positioning plate and the battery cell stack, so that the positioning plate can be fixed to the battery cell stack, so that the positioning plate can play a role in positioning and fixing the battery cell stack, so that the structure of the battery cell stack is stable. In this way, the structure can be kept stable during the movement of the battery cell stack. The positioning plate can heat the first thermally conductive adhesive layer, so that the temperature of the first thermally conductive adhesive layer can be increased, thereby improving the curing stability of the first thermally conductive adhesive layer, and then improving the curing efficiency of the first thermally conductive adhesive layer. In this way, when preparing the battery module, the positioning plate can be more efficiently bonded and fixed to the battery cell stack, thereby improving the preparation efficiency of the battery module.

[0044] The heat generated by the heating element can also be conducted to the battery cell stack through the first thermally conductive adhesive layer, so that when the temperature of the battery cell stack is low, the battery cell stack can be heated, so that the battery cell stack has better performance.

[0045] In the automobile proposed in the present application, the manufacturing efficiency of the automobile can be improved due to the application of the above-mentioned battery module.

[0046] The battery module and the automobile provided in the present application are described in detail below with reference to specific embodiments.

[0047] The present application provides a battery module, referring to Figure 1 and Figure 2 As shown, it includes a housing, a battery cell stack 100, a positioning plate 200, a first thermally conductive adhesive layer 300 and a heating element 400. The battery module can be used in automobiles.

[0048] The shell is the basic component of the battery module of the present application, and the shell can provide a mounting base for at least some of the other components of the battery module and protect at least some of the other components. The shell can be made of metal material, so that the shell has better structural strength, thereby making the shell more durable and reliable.

[0049] The shell has a cavity, and the battery stack 100 can be placed in the cavity of the shell, so that the shell can surround the battery stack 100 to prevent the battery stack 100 from being exposed, thereby protecting the battery stack 100. The battery stack 100 may specifically include a plurality of battery cores 110, and the plurality of battery cores 110 may be stacked along the thickness direction of the battery core 110. Specifically, the plurality of battery cores 110 may be stacked along the thickness direction of the battery core 110, and the plurality of battery cores 110 may be electrically connected in series, so that the overall structure of the battery stack 100 may be relatively compact.

[0050] The positioning plate 200 is arranged on the side wall of the battery cell stack 100 and connected to the side wall of the battery cell stack 100, so that the positioning plate 200 can be connected to the side wall of the multiple battery core parts 110 in the battery cell stack 100, so that the multiple battery core parts 110 in the battery cell stack 100 can be relatively fixed, thereby making the structure of the battery cell stack 100 stable. In this way, when the battery cell stack 100 is moved, especially in the process of hoisting the battery cell stack 100, when the battery core part 110 is subjected to its own gravity, the multiple battery core parts 110 are fixed by the positioning plate 200, avoiding the risk of some battery core parts 110 being separated and falling due to gravity. The first thermal conductive adhesive layer 300 is arranged between the positioning plate 200 and the battery cell stack 100, and the opposite sides of the first thermal conductive adhesive layer 300 can be bonded to the positioning plate 200 and the battery cell stack 100 respectively, so that the battery cell stack 100 and the positioning plate 200 can be fixed. The heat generated by the battery cell stack 100 during operation can also be conducted to the positioning plate 200 through the first thermally conductive adhesive layer 300 , so that the heat of the battery cell stack 100 can be efficiently dissipated, thereby preventing the battery cell stack 100 from being overheated.

[0051] The heating element 400 is disposed on the positioning plate 200, and the heating element 400 is configured to heat the first thermally conductive adhesive layer 300. Specifically, the heating element 400 can generate heat, and the heat can be conducted to the first thermally conductive adhesive layer 300, so that the temperature of the first thermally conductive adhesive layer 300 can be increased, thereby increasing the curing temperature of the first thermally conductive adhesive layer 300, so that the first thermally conductive adhesive layer 300 can be more efficiently bonded to the battery cell stack 100 and the positioning plate 200, so as to fix the battery cell stack 100 and the positioning plate 200.

[0052] When preparing the battery module of the present application, it is necessary to assemble and fix the positioning plate 200 with the battery cell stack 100. Specifically, the first thermally conductive adhesive layer 300 can be coated on the outer wall of the battery cell stack 100 or on the side of the positioning plate 200 facing the battery cell stack 100, and then the battery cell stack 100 and the positioning plate 200 are docked. The heating element 400 can generate heat after being started, and the heat is conducted to the first thermally conductive adhesive layer 300, so that the first thermally conductive adhesive layer 300 can be heated, so that the curing time of the first thermally conductive adhesive layer 300 is shorter, so that the first thermally conductive adhesive layer 300 can more efficiently bond the positioning plate 200 to the battery cell stack 100, thereby making the preparation efficiency of the battery module of the present application higher.

[0053] The positioning plate 200 can be specifically opposite to the side wall of the battery cell stack 100, and the size of the positioning plate 200 can match the area of ​​the side wall of the battery cell stack 100, so that the positioning plate 200 can fully cover the side wall of the battery cell stack 100. The first thermally conductive adhesive layer 300 can be fully coated on the side of the positioning plate 200 facing the battery cell stack 100, so that the side of the positioning plate 200 facing the battery cell stack 100 can be fully bonded to the side wall of the battery cell stack 100, so that the fixing effect of the positioning plate 200 and the battery cell stack 100 is more stable and reliable, so that the structure of the battery module can be further stabilized. The heating element 400 can be configured to heat the positioning plate 200, so that the heat generated by the heating element 400 can be conducted to the first thermally conductive adhesive layer 300 through the positioning plate 200, so that the first thermally conductive adhesive layer 300 can be fully heated, so that all parts of the first thermally conductive adhesive layer 300 can be efficiently heated and cured.

[0054] In addition, when the battery module of the present application is prepared and applied to a car, and is in a low temperature environment, the temperature of the battery cell stack 100 is low, resulting in damage to the performance of the battery cell stack 100. At this time, the heat generated by the heating element 400 can also be transferred to the battery cell stack 100 through the first thermally conductive adhesive layer 300, so that the temperature of the battery cell stack 100 can be increased, so that the battery module of the present application can also operate relatively stably in a low temperature environment.

[0055] In some embodiments, reference Figure 1 and Figure 2As shown, the positioning plate 200 of the present application can be provided with an installation cavity 210, and the installation cavity 210 is the internal cavity structure of the positioning plate 200. The heating element 400 can be arranged in the installation cavity 210 of the positioning plate 200, so that the heating element 400 can heat the positioning plate 200 inside the positioning plate 200, so that the heat generated by the heating element 400 can be fully conducted to various parts of the positioning plate 200, so that the various parts of the first thermal conductive adhesive layer 300 coated on the positioning plate 200 can be fully heated and cured. After the heating element 400 is arranged in the installation cavity 210 of the positioning plate 200, the positioning plate 200 can also serve the purpose of protecting the heating element 400. In addition, the heating element 400 will not occupy the space on the surface of the positioning plate 200, so that the positioning plate 200 can be fully contacted and connected with the battery cell stack 100.

[0056] In some embodiments, reference Figure 2 and Figure 3 As shown, the positioning plate 200 of the present application can be made of metal parts, so that the positioning plate 200 has better structural strength, so that the positioning plate 200 can better support and fix the multiple battery core parts 110 of the battery cell stack 100. The positioning plate 200 is specifically made of aluminum alloy, and the positioning plate 200 has a mounting cavity 210 structure through a stamping process, so that the heating element 400 can be fixed to the positioning plate 200. The length dimension of the positioning plate 200 can be set to 100mm-2000mm, the height dimension of the positioning plate 200 can be set to 5mm-30mm, and the width dimension of the positioning plate 200 can be set to 70mm-200mm. Specifically, the positioning plate 200 can be set according to the size of the battery cell stack 100 to match the battery cell stack 100.

[0057] The battery assembly of the present application may also include an insulating film 220, which may be disposed on the side of the positioning plate 200 facing away from the battery cell stack 100. Specifically, the insulating film 220 may cover the side of the positioning plate 200 facing away from the battery cell stack 100. When the positioning plate 200 is a metal part, the insulating film 220 may prevent the positioning plate 200 from leaking electricity, making the battery module of the present application safer and more reliable to use.

[0058] In some embodiments, the battery module of the present application may also include a second thermally conductive adhesive layer, which is disposed between the heating element 400 and the positioning plate 200, and the opposite sides of the second thermally conductive adhesive layer are respectively bonded to the heating element 400 and the positioning plate 200, so that the heating element 400 can be fixed on the positioning plate 200. The heating element 400 can generate heat, and the heat can be conducted to the second thermally conductive adhesive layer, so that the temperature of the second thermally conductive adhesive layer can be increased, thereby increasing the curing temperature of the second thermally conductive adhesive layer, so that the second thermally conductive adhesive layer can be more efficiently bonded to the heating element 400 and the positioning plate 200, so that the heating element 400 and the positioning plate 200 are fixed.

[0059] When preparing the battery module of the present application, it is necessary to assemble and fix the positioning plate 200 and the heating element 400. Specifically, the first thermally conductive adhesive layer 300 can be coated on the inner wall of the installation cavity 210 of the heating element 400 or the positioning plate 200, and then the heating element 400 and the positioning plate 200 are connected. After the heating element 400 is started, heat can be generated, and the heat is conducted to the second thermally conductive adhesive layer, which can heat the second thermally conductive adhesive layer, so that the curing time of the second thermally conductive adhesive layer is shorter, so that the second thermally conductive adhesive layer can more efficiently bond the positioning plate 200 to the heating element 400, thereby making the preparation efficiency of the battery module of the present application higher.

[0060] The second thermally conductive adhesive layer has good thermal conductivity, so that the heat generated by the heating element 400 can be efficiently transferred to the positioning plate 200 through the second thermally conductive adhesive layer, and then more efficiently transferred to the first thermally conductive adhesive layer 300. The first thermally conductive adhesive layer 300 and the second thermally conductive adhesive layer can be made of the same material structure, so that the preparation cost of the battery module of the present application is lower.

[0061] In some embodiments, reference Figure 2 As shown, a positioning lug 230 may also be provided on the positioning plate 200 of the present application. The positioning lug 230 may be specifically provided on the side of the positioning plate 200 facing away from the battery cell stack 100. The positioning lug 230 is connected to the shell, so that the positioning plate 200 can be fixed to the shell, thereby allowing the battery cell stack 100 to be fixed to the shell through the positioning plate 200. The inner wall of the shell may be provided with a screw hole that matches the opening on the positioning lug 230, and the positioning lug 230 may be fixed to the shell by a bolt, so that the positioning plate 200 is fixed to the shell, so that the fixing effect of the positioning plate 200 and the shell is stable and reliable. Of course, the positioning lug 230 and the shell may also be fixed by means of latches, rivets, etc., which are not limited by the present application.

[0062] In some embodiments, the thermal conductivity of the first thermally conductive adhesive layer 300 of the present application can be set to 0.5-5, so that the thermal conductivity of the first thermally conductive adhesive layer 300 can be better.

[0063] In some embodiments, reference Figure 3As shown, the heating element 400 of the present application can be configured to include a plurality of heating cores 410 and a ceramic sheet 420. Among them, the plurality of heating cores 410 and the ceramic sheet 420 can be alternately arranged along the length direction of the battery cell stack 100, the plurality of heating cores 410 can be connected in series, and the plurality of heating cores 410 can be connected in series through a wire 430. The plurality of heating cores 410 can generate heat, so that the heating element 400 of the present application has a higher heating efficiency for the first thermally conductive adhesive layer 300. When the positioning plate 200 is arranged on the side wall in the length direction of the battery cell stack 100, the first thermally conductive adhesive layer 300 can also be arranged along the length direction of the battery cell stack 100. The plurality of heating cores 410 and the ceramic sheet 420 are arranged along the length direction of the battery cell stack 100, so that the plurality of heating cores 410 can fully heat each part of the first thermally conductive adhesive layer 300 on the side wall in the length direction of the battery cell stack 100, so that the curing efficiency of the first thermally conductive adhesive layer 300 is higher.

[0064] The heating core 410 can specifically adopt a PCT (positive temperature coefficient) thermistor, which has the characteristic of constant temperature heating. The temperature of the heating core 410 can be controlled by controlling the power-on time of the heating core 410, so as to achieve the purpose of controlling the temperature of the first thermally conductive adhesive layer 300. The heating element 400 can be powered on for about 3 minutes to heat the first thermally conductive adhesive layer 300 to 70°C suitable for its curing. The heating element 400 is continuously powered on for about 30 minutes, and the temperature of the positioning plate 200 can be heated to about 80°C, the temperature of the surface of the heating core 410 reaches 60°C, and the internal temperature of the heating core 410 is 50°C. As the size of the heating element 400 is powered on and heated, the maximum temperature of the positioning plate 200 is about 90°C, the maximum temperature of the surface of the heating core 410 reaches 75°C, and the internal temperature of the heating core 410 reaches 65°C. In this way, the temperature of the first thermally conductive adhesive layer 300 can be accurately controlled by controlling the power-on time of the heating element 400, making the battery module preparation process of the present application simpler.

[0065] In some embodiments, reference Figure 1 As shown, the battery cell stack 100 of the present application may also be provided with a spacer 120, which is provided on opposite sides of each battery cell 110 in the plurality of battery cells 110, so that the spacer can also separate adjacent battery cells 110. The number of spacers 120 can be set according to the number of battery cells 110, and the spacer can be provided to prevent the battery cells 110 from directly contacting and affecting each other. Specifically, the spacer can be a heat insulating member, which can prevent the adjacent battery cells 110 from conducting heat to each other to a certain extent.

[0066] In some embodiments, reference Figure 1As shown, the battery hole group of the present application may also be provided with an integrated tray 600, an upper cover 700 and an end plate 500. Among them, the end plates 500 may be arranged on both sides of the battery stack 100 along the stacking direction of the multiple battery cells 110 in the battery stack 100, and the two end plates 500 may limit the battery stack 100 in the stacking direction of the multiple battery cells 110 in the battery stack 100, so as to further stabilize the structure of the battery stack 100. The integrated tray 600 is arranged on one side of the top of the battery stack 100, and the integrated tray 600 may be fixed to one side of the top of the multiple battery cells 110 in the battery stack 100, so as to stabilize the structure of the battery stack 100. The upper cover 700 can be set on the integrated tray 600, and the upper cover 700 can be fixed to the integrated tray 600. The upper cover 700 can also serve the purpose of positioning and fixing the battery cell stack 100. The upper cover 700 cooperates with the end plate 500 and the positioning plate 200 to cover multiple outer walls of the battery cell stack 100 to protect the battery cell stack 100.

[0067] Based on the above battery module, an embodiment of the present application also proposes a car, which includes the above battery module.

[0068] Finally, it should be noted that the above implementation modes are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned implementation modes, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned implementation modes can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation modes of the present application.

Claims

1. A battery module, characterized in that: include: A housing having a cavity; A battery cell stack (100) is arranged in the cavity; A positioning plate (200) is arranged opposite to the outer wall of the battery cell stack (100); A first thermally conductive adhesive layer (300) is disposed between the battery cell stack (100) and the positioning plate (200), and opposite sides of the first thermally conductive adhesive layer (300) are respectively bonded to the battery cell stack (100) and the positioning plate (200); A heating element (400) is disposed on the positioning plate (200), and the heating element (400) is configured to heat the first thermal conductive adhesive layer (300).

2. The battery module according to claim 1, characterized in that: The positioning plate (200) has a mounting cavity (210) therein, and the heating element (400) is arranged in the mounting cavity (210).

3. The battery module according to claim 2, characterized in that: It also includes a second thermally conductive adhesive layer, which is arranged between the heating element (400) and the positioning plate (200), and the opposite sides of the second thermally conductive adhesive layer are respectively bonded to the heating element (400) and the positioning plate (200), and the heating element (400) is also configured to heat the second thermally conductive adhesive layer.

4. The battery module according to claim 3, characterized in that: It also comprises an insulating film (220), wherein the insulating film (220) covers a side of the positioning plate (200) facing away from the heating element (400), and the positioning plate (200) is a metal element.

5. The battery module according to claim 3, characterized in that: A positioning lug (230) is provided on the side of the positioning plate (200) facing away from the battery cell stack (100), and the positioning lug (230) is fixed to the shell.

6. The battery module according to claim 1, characterized in that: The thermal conductivity of the first thermally conductive adhesive layer (300) is 0.5-5.

7. The battery module according to any one of claims 1 to 6, characterized in that: The heating element (400) comprises a plurality of heating cores (410) and a ceramic sheet (420), wherein the plurality of heating cores (410) and the plurality of ceramic sheets (420) are alternately arranged along the length direction of the battery cell stack (100), the plurality of heating cores (410) are electrically connected, and the heating core (410) is a thermistor heater.

8. The battery module according to any one of claims 1 to 6, characterized in that: The battery cell stack (100) comprises a battery cell part (110) and a separator (120), wherein the number of the battery cell parts (110) is multiple, and the multiple battery cell parts (110) are stacked along the thickness direction of the battery cell part (110), and the separator (120) is arranged between adjacent battery cell parts (110).

9. The battery module according to claim 8, characterized in that: The battery cell stack (100) further comprises an integrated tray (600), an upper cover (700) and an end plate (500), wherein the integrated tray (600) is arranged on the top of the battery cell stack (100), the upper cover (700) is arranged on the integrated tray (600), the end plate (500) is arranged on both sides of the battery cell stack (100) along the stacking direction of the plurality of battery cell parts (110) in the battery cell stack (100), the number of the positioning plates (200) and the heating element (400) is two, the two positioning plates (200) and the two heating elements (400) are arranged in a one-to-one correspondence, and the two positioning plates (200) are arranged on both sides of the battery cell stack (100) along a direction perpendicular to the stacking direction of the plurality of battery cell parts (110) in the battery cell stack (100).

10. An automobile, characterized in that: Comprising a battery module as described in any one of claims 1 to 9.

Images