Battery device

Abstract

The invention provides a battery device, and relates to the technical field of batteries, the battery device comprises a battery monomer and a liquid cooling piece, the liquid cooling piece is provided with a mounting cavity and a mounting opening communicated with the mounting cavity, and the battery monomer penetrates through the mounting opening and is mounted in the mounting cavity; the liquid cooling piece is provided with a flow channel which is used for accommodating a cooling medium; and the liquid cooling piece is thermally conducted with the battery monomers. The liquid cooling part wraps the peripheral side of the battery single body and has a mounting and fixing effect on the battery single body, so that the position of the battery single body in the battery device is stable, the structural stability of the battery device is improved, the contact area of the liquid cooling part and the battery single body can be increased, and the cooling efficiency of the battery single body through the liquid cooling part is improved; the safety and the service life of the battery device are further improved, and the use performance of the battery device is further improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device. Background Art

[0002] With the continuous development of battery devices, the energy density and charging rate of battery devices are getting higher and higher. During use, the heat generated by the battery devices is also getting higher and higher.

[0003] As the temperature of a battery device rises, its safety deteriorates. In related art, a battery device includes a battery assembly and a cold plate, which is located at the bottom of the battery assembly and dissipates heat from the battery assembly. However, this method has low heat dissipation efficiency, leading to deterioration in battery safety over long-term use.

[0004] Therefore, there is an urgent need for a battery device that can improve safety. Summary of the Invention

[0005] The present application provides a battery device that improves the heat dissipation efficiency of the battery device, thereby improving the safety of the battery device.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions:

[0007] The present application provides a battery device, comprising:

[0008] Battery cells;

[0009] A liquid cooling element, wherein the liquid cooling element has an installation cavity and an installation opening connected to the installation cavity, and the battery cell passes through the installation opening and is installed in the installation cavity; the liquid cooling element has a flow channel, and the flow channel is used to accommodate a cooling medium; the liquid cooling element and the battery cell are thermally connected.

[0010] As an optional implementation, at least a portion of the flow channel is communicated with the installation cavity.

[0011] As an optional embodiment, the liquid cooling element has a cooling interlayer, and the cooling interlayer forms the flow channel;

[0012] The liquid cooling component is provided with a communication structure, and a communication cavity of the communication structure is connected with the cooling interlayer and the installation cavity.

[0013] As an optional embodiment, the liquid cooling component has a groove, the groove is located in the installation cavity, the groove forms the flow channel, and the notch of the groove faces the installation cavity.

[0014] As an optional embodiment, the battery device further includes a heat conductor, which is located in the installation cavity; along the thickness direction of the heat conductor, two sides of the heat conductor respectively abut against the battery cell and the cavity wall of the installation cavity.

[0015] As an optional embodiment, the heat conductive member includes a first portion, the first portion is arranged toward the mounting opening, and the first portion is connected to the battery cell and the liquid cooling member respectively.

[0016] As an optional embodiment, the heat conducting member includes a second portion, one end of the second portion is connected to the first portion, and the other end of the second portion extends toward the mounting opening;

[0017] The second portion covers at least a portion of a peripheral side wall of the battery cell.

[0018] As an optional embodiment, the heat conducting member further includes a third portion, one end of the third portion is connected to the end of the second portion facing away from the first portion, and the other end of the third portion extends toward the mounting opening;

[0019] The third portion covers at least a portion of a peripheral side wall of the battery cell.

[0020] As an optional embodiment, along the direction from the bottom of the liquid cooling component to the mounting opening, the extension length of the second portion is L1, and the extension length of the third portion is L2;

[0021] The L1 and the L2 satisfy: 0.5≤L2 / L1≤2.

[0022] As an optional embodiment, the first part includes a polyurethane part, an epoxy resin part, and a silicone part;

[0023] and / or, the second part includes a polyurethane part, an epoxy resin part, or a silicone part;

[0024] And / or, the third part includes a silicone rubber part and an acrylic polyurethane part.

[0025] The battery device provided in the present application includes a battery cell and a liquid cooling element. The liquid cooling element has an installation cavity and an installation opening connected to the installation cavity. The battery cell passes through the installation opening and is installed in the installation cavity. The liquid cooling element has a flow channel for accommodating a cooling medium. The liquid cooling element and the battery cell are thermally conductive. In the present application, the liquid cooling element wraps around the sides of the battery cell and forms a mounting and fixing effect on the battery cell through the liquid cooling element, so that the position of the battery cell inside the battery device is stable, thereby improving the structural stability of the battery device. Furthermore, the liquid cooling element can also protect the battery cell, preventing the battery cell from being directly subjected to external impact and causing deformation, further improving the safety of the battery device. In addition, the liquid cooling element wraps around the battery cell, which can increase the contact area between the liquid cooling element and the battery cell, thereby increasing the efficiency of cooling the battery cell through the liquid cooling element, further improving the safety and service life of the battery device, as well as the performance of the battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 A schematic diagram of a battery device provided in an embodiment of the present application;

[0028] Figure 2 An exploded diagram of the structure of a battery device provided in an embodiment of the present application;

[0029] Figure 3 Schematic diagram of the liquid cooling element in the battery device provided in the embodiment of the present application Figure 1 ;

[0030] Figure 4 for Figure 3 AA section view;

[0031] Figure 5 for Figure 3 BB cross-sectional view;

[0032] Figure 6 Schematic diagram of the liquid cooling element in the battery device provided in the embodiment of the present application Figure 2 ;

[0033] Figure 7 for Figure 6 CC sectional view;

[0034] Figure 8 for Figure 6 DD sectional view;

[0035] Figure 9 This is a front view of a heat conducting member in a battery device according to an embodiment of the present application.

[0036] Description of reference numerals:

[0037] 100-battery device;

[0038] 110-battery monomer;

[0039] 120-liquid cooling parts;

[0040] 121 - mounting cavity; 1211 - first surface; 1212 - second surface; 1213 - communication structure;

[0041] 122-installation opening;

[0042] 123-cooling interlayer;

[0043] 124-groove;

[0044] 130-heat conducting element;

[0045] 131-Part I;

[0046] 132-Part II;

[0047] 133-Part III. DETAILED DESCRIPTION

[0048] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0049] See Figure 1 The present application provides a battery device 100 that can be used in the fields of vehicles, aircraft, energy storage tanks, etc. The vehicle can be a traditional fuel vehicle, a new energy vehicle, etc., which is not required by the embodiments of the present application.

[0050] Illustratively, the battery device 100 may be a battery pack, a battery cell assembly, etc.

[0051] The battery device 100 in the embodiment of the present application includes a battery cell 110. The number of the battery cell 110 can be one, two, or more.

[0052] When there are multiple battery cells 110, the multiple battery cells 110 can be arranged in an array to facilitate assembly and fixation of the multiple battery cells 110, thereby reducing the shaking between the battery cells 110, and further improving the structural stability of the battery device 100, so as to avoid the problem of increased internal resistance and heat of the battery device 100 caused by unstable connection between the battery cells 110.

[0053] It's easy to understand that as battery device 100 technology continues to advance, the energy density and charge rate of battery devices 100 are increasing. This can lead to increased heat generation in the battery device 100, further compromising safety and reducing the service life of the battery device 100. Therefore, it's necessary to manage the battery device 100 to lower its temperature. This not only improves the safety and service life of the battery device 100, but also enhances its performance.

[0054] So, combined Figures 1 to 5 The battery device 100 provided in the embodiment of the present application further includes a liquid cooling element 120. The liquid cooling element 120 has a mounting cavity 121 and a mounting opening 122 communicating with the mounting cavity 121. The battery cell 110 passes through the mounting opening 122 and is mounted in the mounting cavity 121. The liquid cooling element 120 has a flow channel for accommodating a cooling medium. The liquid cooling element 120 and the battery cell 110 are thermally conductive.

[0055] As will be readily appreciated, the battery cells 110 are installed in the mounting cavity 121 through the mounting opening 122. The liquid cooling element 120 surrounds the sides of the battery cells 110, securing them in place and stabilizing their position within the battery assembly 100, thereby enhancing the structural stability of the battery assembly 100. Furthermore, the liquid cooling element 120 protects the battery cells 110, preventing them from deformation due to direct external impact, further enhancing the safety of the battery assembly 100.

[0056] In addition, the liquid cooling element 120 in the embodiment of the present application wraps the battery cell 110, increasing the contact area between the liquid cooling element 120 and the battery cell 110, thereby increasing the efficiency of cooling the battery cell 110 through the liquid cooling element 120, further improving the safety and service life of the battery device 100, as well as the performance of the battery device 100.

[0057] It should be noted that, in the embodiment of the present application, the pole of the battery cell 110 faces the side where the mounting opening 122 is located.

[0058] Combine Figure 3 、 Figure 5 、 Figure 6 and Figure 8In some embodiments, the mounting cavity 121 has a first surface 1211 and a second surface 1212 facing each other along the width of the battery cell 110. The distance between the first surface 1211 and the second surface 1212 gradually increases from the bottom of the liquid-cooling element 120 to the mounting opening 122. It is understood that the distance between the first surface 1211 and the second surface 1212 near the mounting opening 122 is greater than the distance between the first surface 1211 and the second surface 1212 near the bottom of the liquid-cooling element 120. This facilitates the entry of the battery cell 110 into the mounting cavity 121 through the mounting opening 122, thereby improving the assembly efficiency of the battery device 100.

[0059] See Figures 3 to 8 In the embodiment of the present application, the liquid cooling element 120 has a flow channel through which a cooling medium flows. The flow channel is arranged around the circumference of the liquid cooling element 120 to increase the flow position and area of ​​the cooling medium. This allows the circumference of the battery cells 110 to be thermally conductive to the liquid cooling element 120, thereby improving the heat dissipation efficiency and effect of the battery device 100, further enhancing the safety of the battery device 100, and extending the service life of the battery device 100.

[0060] It should be noted that in the embodiments of the present application, the number of flow channels can be one or more, and the embodiments of the present application do not require a specific number of flow channels. When there are multiple flow channels, the flow channels can be interconnected, or only a portion of the flow channels can be interconnected, which is not required in the embodiments of the present application.

[0061] It should also be noted that the cooling medium mentioned in the embodiments of the present application can be water, aqueous solution, cooling grease, etc., without limitation.

[0062] Combine Figures 3 to 8 In an optional embodiment, at least part of the flow channel is connected to the mounting cavity 121. In this way, the connection between the flow channel and the mounting cavity 121 allows the cooling medium to enter the mounting cavity 121, where the cooling medium contacts the battery cell 110 and reduces the temperature of the battery cell 110 by immersion. At the same time, the cooling medium fills the space between the battery cell 110 and the cavity wall of the mounting cavity 121, and the battery cell 110, the cooling medium, and the liquid cooling element 120 are thermally conductive to each other, thereby increasing the thermal conductivity area of ​​the battery cell 110 and promoting heat transfer between the battery cell 110, the cooling medium, and the liquid cooling element 120. This further improves the heat dissipation rate and heat dissipation effect of the battery device 100, thereby improving the safety of the battery device 100 and extending the service life of the battery device 100.

[0063] It should be noted that, along the height direction of the battery cell 110, the height of the liquid level of the cooling medium in the installation cavity 121 is lower than the height of the pole of the battery cell 110, so as to prevent the cooling medium and the pole of the battery cell 110 from being electrically conductive, thereby preventing the probability of internal short circuit of the battery device 100, thereby improving the safety of the battery device 100.

[0064] There are many ways to connect the flow channel and the installation cavity 121. Figure 3 、 Figure 4 and Figure 5 As one optional embodiment, the liquid cooling component 120 has a cooling interlayer 123, and the cooling interlayer 123 forms a flow channel; the liquid cooling component 120 is provided with a connecting structure 1213, and the connecting cavity of the connecting structure 1213 connects the cooling interlayer 123 and the installation cavity 121.

[0065] Illustratively, the connecting structure 1213 includes a connecting hole, a connecting pipe, a connecting valve, etc., which is not limited in the embodiment of the present application.

[0066] When the connection structure is a connecting hole, the hole wall of the connecting hole forms a connecting cavity. The number of connecting holes can be multiple, and multiple connecting holes are set on the cavity wall of the installation cavity 121. The multiple connecting holes can be arranged in an array, for example: a circular array arrangement, a linear array arrangement, etc. The provision of multiple connecting holes allows the cooling medium to enter the installation cavity 121 from multiple angles, and can also reduce the pressure of the cooling medium in the flow channel to avoid explosion damage to the liquid cooling part 120 caused by excessive internal pressure of the liquid cooling part 120, thereby extending the service life of the liquid cooling part 120, while meeting the heat dissipation requirements of the battery device 100 and improving the safety of the battery device 100, thereby extending the service life of the battery device 100.

[0067] In some embodiments, a communication valve is provided on the liquid-cooling element 120 to control the connection between the mounting cavity 121 and the liquid-cooling interlayer. This allows the opening and closing of the communication valve to be controlled based on the actual heat distribution of the battery assembly 100, making the heat dissipation process of the battery assembly 100 controllable. This not only improves the heat dissipation efficiency of the battery assembly 100 but also reduces its heat dissipation energy consumption.

[0068] See Figure 6 、 Figure 7 and Figure 8 In some embodiments, the liquid cooling member 120 has a groove 124 . The groove 124 is located in the mounting cavity 121 . The groove 124 forms a flow channel, and the notch of the groove 124 faces the mounting cavity 121 .

[0069] It can be understood that, in the embodiment of the application, the flow channel formed by the groove 124 is in communication with the mounting cavity 121 through the slot of the groove 124, and the flow channel formed by the groove 124 enlarges the contact area of the cooling medium with the mounting cavity 121, which can improve the heat conduction efficiency. At the same time, the groove wall of the groove 124 can also destroy the laminar flow formed by the cooling medium in the flow and increase the turbulent flow, thereby strengthening the heat dissipation effect. In addition, the groove 124 and the mounting cavity 121 are directly in communication, which can reduce the setting of the communication components, thereby simplifying the space ratio of the liquid cooling member 120, increasing the space utilization rate of the mounting cavity 121, helping to improve the energy density and organization efficiency of the battery device 100, and also reducing the cost of the battery device 100.

[0070] In some embodiments, the groove 124 can be formed by an integrated forming method such as stamping, cutting, etc., to prevent the cooling medium from leaking from the side wall of the liquid cooling member 120, thereby avoiding the short circuit problem caused by the leakage of the cooling medium inside the battery device 100, and further improving the safety of the battery device 100.

[0071] In combination with Figure 1 and Figure 2 Optionally, the battery device 100 further comprises a heat conduction member 130, and the heat conduction member 130 is located in the mounting cavity 121. Along the thickness direction of the heat conduction member 130, the two sides of the heat conduction member 130 respectively abut against the battery monomer 110 and the cavity wall of the mounting cavity 121. In this way, the heat conduction member 130 is arranged between the battery monomer 110 and the liquid cooling member 120, and the heat conduction member 130 simultaneously contacts the heat source (the battery monomer 110) and the heat dissipation interface (the cavity wall of the mounting cavity 121), forming a rapid heat transfer path between the battery monomer 110, the heat conduction member 130 and the cavity wall of the mounting cavity 121, which can reduce the temperature difference of each part of the battery monomer 110, make the temperature distribution of the battery monomer 110 uniform, and further improve the temperature distribution uniformity of the battery device 100.

[0072] Furthermore, the heat conduction member 130 is connected to the inner wall of the battery monomer 110 and the liquid cooling member 120 respectively, so as to fill the air gap between the battery monomer 110 and the liquid cooling member 120 through the heat conduction member 130, and further improve the heat conduction efficiency between the battery monomer 110, the heat conduction member 130 and the liquid cooling member 120. In addition, the heat conduction member 130 forms a supporting effect on the battery monomer 110, which can inhibit the displacement caused by the volume expansion / contraction of the battery monomer 110 in the charging and discharging process, thereby ensuring the structural stability of the battery device 100, and further improving the safety of the battery monomer 110.

[0073] In combination with Figure 1 , Figure 2 and Figure 9In some embodiments, the heat conducting member 130 includes a first portion 131 , which is disposed toward the mounting opening 122 , and is connected to the battery cell 110 and the liquid cooling member 120 , respectively.

[0074] Optionally, the first portion 131 includes a polyurethane member, an epoxy resin member, a silicone member, etc.

[0075] Illustratively, the first portion 131 covers the bottom of the battery cell 110 and is connected to the bottom of the battery cell 110. In a specific implementation, the first portion 131 can be a silicone member. The first portion 131 is positioned at the bottom of the battery cell 110. After the silicone cures, the battery cell 110 is stably connected to the liquid cooling element 120 via the first portion 131. This maintains a stable connection between the battery cell 110 and the liquid cooling element 120, absorbing vibration energy from the battery assembly 100, preventing the battery cell 110 from loosening, and reducing noise from the battery assembly 100. Furthermore, the first portion 131 connects the bottom walls of the battery cell 110 and the liquid cooling element 120, respectively, simplifying the fixed connection between the battery cell 110 and the liquid cooling element 120. This helps improve the assembly efficiency of the battery assembly 100 and reduces the production cost of the battery assembly 100.

[0076] It should be noted that the first portion 131 in the embodiment of the present application may be a polyurethane part or an epoxy resin part.

[0077] Combine Figure 1 、 Figure 2 and Figure 9 Optionally, the heat conductor 130 includes a second portion 132 , one end of the second portion 132 is connected to the first portion 131 , and the other end of the second portion 132 extends toward the mounting opening 122 ; the second portion 132 covers at least a portion of the peripheral side wall of the battery cell 110 .

[0078] Optionally, the second portion 132 includes a polyurethane member, an epoxy resin member, or a silicone member.

[0079] It is easy to understand that the first portion 131 is located at the bottom of the battery cell 110, dissipating heat from the bottom of the battery cell 110. The second portion 132 covers the peripheral sidewalls of the battery cell 110 and also dissipates heat from the peripheral sides of the battery cell 110. This thermally conductive member 130 achieves three-dimensional heat dissipation for the battery cell 110, thereby increasing the thermal conductivity of the battery cell 110 and improving the heat dissipation efficiency of the battery device 100. Furthermore, the second portion 132 covers the peripheral sidewalls of the battery cell 110, providing thickness compensation and protection for the battery cell 110, thereby enhancing the needle puncture safety of the battery cell 110. In addition, the second portion 132 provides support for the battery cell 110, suppressing expansion and deformation of the battery cell 110 during charge and discharge cycles.

[0080] It should be noted that the second portion 132 may be a polyurethane member, an epoxy resin member or a silicone member.

[0081] In some embodiments, the thermal conductor 130 further includes a third portion 133 , one end of the third portion 133 being connected to the end of the second portion 132 away from the first portion 131 , and the other end of the third portion 133 extending toward the mounting opening 122 ; the third portion 133 covers at least a portion of the circumferential side wall of the battery cell 110 .

[0082] In some embodiments, the third portion 133 may be a silicone rubber member or an acrylic polyurethane member.

[0083] It is easy to understand that the first portion 131 is located at the bottom of the battery cell 110 and dissipates heat from the bottom of the battery cell 110. The second portion 132 covers the peripheral sidewalls of the battery cell 110 and dissipates heat from the peripheral side of the battery cell 110. The third portion 133 covers the peripheral sidewalls of the battery cell 110 and dissipates heat from the peripheral side of the battery cell 110. This thermal conductive member 130 achieves three-dimensional, multi-position heat dissipation for the battery cell 110, increasing the heat conduction area of ​​the battery cell 110 and thereby improving the heat dissipation efficiency of the battery device 100. Furthermore, the third portion 133 covers the peripheral sidewalls of the battery cell 110, providing thickness compensation and protection for the battery cell 110 through the second portion 132, thereby enhancing the needle puncture safety of the battery cell 110.

[0084] See Figure 9 In some embodiments, along the direction from the bottom of the liquid cooling member 120 to the mounting opening 122 , the extension length of the second portion 132 is L1, and the extension length of the third portion 133 is L2; ​​L1 and L2 satisfy: 0.5≤L2 / L1≤2.

[0085] Exemplarily, L2 / L1 can be 0.5, 0.6, 0.7, 0.8, 1.9, 1, 1.1, 1.2, 1.3, 1.5, 1.6, 1.7, 1.8, 1.9, 2, etc., as long as it meets the above numerical range, and this embodiment of the present application does not require this.

[0086] It can be understood that the extension length of the third portion 133 is different from the extension length of the second portion 132, and the heat conduction efficiency of the heat conductive member 130 to the peripheral side wall of the battery cell 110 is different. By selecting the ratio of L2 to L2, the temperature distribution of the battery cell 110 after heat dissipation can be uniform, so as to prevent the occurrence of local high temperature, so that the heat dissipation effect of the battery device 100 is better, and it helps to enhance the safety of the battery device 100 and extend the service life of the battery device 100.

[0087] It should be noted that references in this specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," and the like indicate that the described embodiment may include a particular feature, structure, or characteristic, but not necessarily every embodiment includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0088] Generally speaking, terms should be understood, at least in part, based on the context in which they are used. For example, as used herein, the term "one or more" can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense, depending at least in part on the context. Similarly, terms such as "a," "an," or "the" can also be understood to convey either singular or plural usage, depending at least in part on the context.

[0089] It should be readily understood that “on,” “above,” and “over” in this application should be interpreted in the broadest manner, such that “on” means not only “directly on something,” but also includes “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also includes “above” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0090] Additionally, spatially relative terms, such as "below," "beneath," "beneath," "above," and the like, may be used herein for ease of description to describe the relationship of one element or feature to other elements or features as depicted in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented (rotated 90° or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery device, characterized in that: include: Battery cell (110); A liquid cooling member (120) is provided, wherein the liquid cooling member (120) has a mounting cavity (121) and a mounting opening (122) communicating with the mounting cavity (121); the battery cell (110) passes through the mounting opening (122) and is mounted in the mounting cavity (121); the liquid cooling member (120) has a flow channel for accommodating a cooling medium; and the liquid cooling member (120) and the battery cell (110) are thermally conductive.

2. The battery device according to claim 1, wherein: At least a portion of the flow channel is in communication with the installation cavity (121).

3. The battery device according to claim 2, characterized in that The liquid cooling element (120) has a cooling interlayer (123), and the cooling interlayer (123) forms the flow channel; A communication structure (1213) is provided on the liquid cooling component (120), and a communication cavity of the communication structure (1213) is connected to the cooling interlayer (123) and the installation cavity (121).

4. The battery device according to claim 2, wherein: The liquid cooling component (120) has a groove (124), the groove (124) is located in the installation cavity (121), the groove (124) forms the flow channel, and the notch of the groove (124) faces the installation cavity (121).

5. The battery device according to any one of claims 1 to 4, characterized in that: The invention also includes a heat conducting member (130), the heat conducting member (130) being located in the installation cavity (121); along the thickness direction of the heat conducting member (130), two sides of the heat conducting member (130) are respectively in contact with the battery cell (110) and the cavity wall of the installation cavity (121).

6. The battery device according to claim 5, characterized in that The heat conducting member (130) includes a first portion (131), the first portion (131) is arranged toward the mounting opening (122), and the first portion (131) is respectively connected to the battery cell (110) and the liquid cooling member (120).

7. The battery device according to claim 6, characterized in that The heat conducting member (130) includes a second portion (132), one end of the second portion (132) is connected to the first portion (131), and the other end of the second portion (132) extends toward the mounting opening (122); The second portion (132) covers at least a portion of a peripheral side wall of the battery cell (110).

8. The battery device according to claim 7, characterized in that The heat conducting member (130) further includes a third portion (133), one end of the third portion (133) being connected to an end of the second portion (132) facing away from the first portion (131), and the other end of the third portion (133) extending toward the mounting opening (122); The third portion (133) covers at least a portion of a peripheral side wall of the battery cell (110).

9. The battery device according to claim 8, characterized in that Along the direction from the bottom of the liquid cooling component (120) to the mounting opening (122), the extension length of the second portion (132) is L1, and the extension length of the third portion (133) is L2; The L1 and the L2 satisfy: 0.5≤L2 / L1≤2.

10. The battery device according to claim 8, characterized in that The first part (131) includes a polyurethane part, an epoxy resin part, and a silicone part; and / or, the second part (132) includes a polyurethane part, an epoxy resin part, or a silicone part; And / or, the third part (133) includes a silicone rubber part or an acrylic polyurethane part.

Images