Battery device

Abstract

The utility model provides a battery device, and relates to the technical field of batteries. The battery device comprises a box body, a battery assembly and a liquid cooling assembly, the box body is provided with a containing cavity, and the battery assembly is arranged in the containing cavity. The battery assembly comprises a plurality of single batteries, the liquid cooling assembly comprises a liquid guiding piece, the liquid guiding piece is arranged on one side of each single battery, the liquid guiding piece is provided with at least two flow channels, and a liquid outlet of each flow channel is located in the side, facing the single batteries, of the liquid guiding piece and communicated with the containing cavity. A control piece is arranged at an inlet of the flow channel and used for controlling the opening degree of the inlet of the flow channel so as to adjust the flow of the cooling medium. Therefore, more cooling media can be introduced into the high-temperature part of the battery device so as to quickly reduce the temperature of the battery monomers, so that the temperature distribution in the battery device is uniform, and the heat dissipation efficiency and the heat dissipation effect of the battery device are improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device. Background Technology

[0002] With the continuous development of battery technology, battery devices are being used more and more widely in the power field.

[0003] The battery device includes a housing and multiple battery cells. These battery cells generate heat during use, and air cooling and / or liquid cooling are commonly used to cool them down.

[0004] However, the heat is unevenly distributed inside the battery device, making it difficult to improve the heat dissipation efficiency of the battery device. Utility Model Content

[0005] This application provides a battery device that can improve the heat dissipation efficiency of the battery device.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] This application provides a battery device, including:

[0008] The housing has a receiving cavity;

[0009] A battery assembly disposed in the accommodating cavity; the battery assembly includes a plurality of battery cells arranged in an array and spaced apart.

[0010] A liquid cooling assembly includes a liquid guide disposed on one side of the battery cell. The liquid guide has at least two flow channels, and the outlet of each flow channel is located on the side of the liquid guide facing the battery cell and communicates with the receiving cavity. A control element is provided at the inlet of the flow channel to control the opening degree of the inlet of the flow channel to adjust the flow rate of the cooling medium.

[0011] As an optional implementation, the liquid guide has a first liquid cavity and a protrusion structure located in the first liquid cavity, the protrusion structure dividing the first liquid cavity into at least two flow channels.

[0012] As an optional implementation, the protrusion structure has a receiving portion, the opening of which faces the inlet of the flow channel;

[0013] The control component includes a sliding part and a driving part. The sliding part is retractably disposed relative to the opening of the receiving part. The driving part is connected to the sliding part and is used to drive the sliding part to retract and move, so as to control the opening degree of the inlet of the flow channel.

[0014] As an optional implementation, the battery device has a temperature detection element and a battery management system, wherein the temperature detection element is disposed on the battery assembly and acquires the temperature parameters of the battery assembly;

[0015] The battery management system is electrically connected to the temperature detection device and the control device;

[0016] When the temperature parameter is greater than or equal to the preset temperature parameter, the battery management system controls the movement of the control component to control the opening degree of the inlet of the flow channel.

[0017] As an optional implementation, the liquid cooling assembly further includes a separator disposed between adjacent battery cells; the separator has a second liquid cavity and a hollow structure, the second liquid cavity being connected to the liquid outlet of the flow channel; the hollow structure is connected to the second liquid cavity and the receiving cavity respectively.

[0018] As an optional implementation, the battery device further includes an inlet pipe and an outlet pipe, the first end of the inlet pipe being connected to the liquid guide, and the second end of the inlet pipe extending to the outside of the housing and used for connection with an external device;

[0019] The liquid outlet pipe is located in the housing to connect the accommodating cavity and the outside of the housing.

[0020] As an optional implementation, there are multiple battery components arranged in an array, with liquid guides provided between adjacent battery components.

[0021] As an optional implementation, the battery cell has a terminal post facing the top of the housing;

[0022] In the accommodating cavity, the cooling medium has a liquid level that is lower than the plane where the electrode is located along the direction from the bottom to the top of the housing.

[0023] As an optional implementation, the box includes a body and a lid, the lid being sealed to the top of the body, and the body and the lid together forming the accommodating cavity.

[0024] As an optional implementation, the battery device further includes a fixing member disposed in the receiving cavity and surrounding the periphery of the battery assembly.

[0025] The battery device provided in this application includes a housing, a battery assembly, and a liquid cooling assembly. The housing has a receiving cavity in which the battery assembly is disposed. The battery assembly includes multiple individual battery cells to increase the energy density of the battery device. The array arrangement of these cells makes the battery assembly structurally regular, facilitating assembly and connection between the battery assembly and the housing, thereby improving the production efficiency of the battery device. During use, the individual battery cells generate heat. By spaced the multiple battery cells apart, the contact area between adjacent cells is reduced, preventing heat conduction between adjacent cells and facilitating heat dissipation, thus improving the heat dissipation efficiency of the battery device. The liquid cooling assembly includes a liquid guide located on one side of the battery cell. The liquid guide has at least two flow channels, with the outlet of each flow channel located on the side of the liquid guide facing the battery cell and communicating with the receiving cavity. A control element is provided at the inlet of the flow channel to control the opening degree of the flow channel inlet, thereby adjusting the flow rate of the cooling medium. The control element allows for adjustment of the flow channel inlet opening, achieving the purpose of adjusting the flow rate of the cooling medium. In this way, more cooling medium can be introduced into the hotter parts of the battery device to quickly reduce the temperature of the individual battery cells, thereby making the temperature distribution within the battery device more uniform and improving the heat dissipation efficiency and effect of the battery device. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the battery device provided in the embodiments of this application;

[0028] Figure 2 This is an exploded view of the battery device provided in the embodiments of this application;

[0029] Figure 3 This is a schematic diagram showing the connection between the battery assembly and the liquid cooling assembly in the battery device provided in the embodiments of this application;

[0030] Figure 4 A cross-sectional view of a battery device provided in an embodiment of this application;

[0031] Figure 5 for Figure 4 Enlarged view of the local structure of I in the image;

[0032] Figure 6 for Figure 3Enlarged view of the local structure within the dashed box area;

[0033] Figure 7 Exploded view of a battery cell and separator in a battery device provided in an embodiment of this application;

[0034] Figure 8 for Figure 4 Enlarged view of the local structure of II in the diagram.

[0035] Explanation of reference numerals in the attached figures:

[0036] 100-Battery Unit;

[0037] 110 - Box body; 111 - Receiving cavity; 112 - Main body; 113 - Box cover;

[0038] 120 - Battery module; 121 - Battery cell; 122 - Terminal post;

[0039] 130 - Liquid cooling assembly;

[0040] 131-Liquid guide; 1310-First flow channel; 1311-Second flow channel; 1312-Third flow channel; 1313-First inlet; 1314-Second inlet; 1315-Third inlet; 1316-First liquid chamber; 1317-Protruding structure; 1318-Receiving part; 1319-Liquid outlet; 1320-Transfer component;

[0041] 132-Control component; 1321-First control component; 1322-Second control component; 1323-Third control component; 1324-Sliding part; 1325-Drive part;

[0042] 133-Separator; 1331-Hollow structure; 1332-First through hole; 1333-Second through hole;

[0043] 140 - Inlet pipe; 150 - Outlet pipe;

[0044] 160 - Fastener; 161 - Protrusion;

[0045] 170 - Support component; 171 - Groove;

[0046] 180 - Seal. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0048] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 This application provides a battery device 100, including a housing 110 and a battery assembly 120. The housing 110 has a receiving cavity 111, in which the battery assembly 120 is disposed. The housing 110 provides protection for the battery assembly 120, preventing deformation and thermal runaway of the battery device 100 due to external impacts, thereby improving the safety of the battery device 100.

[0049] In this embodiment of the application, the battery assembly 120 includes a plurality of battery cells 121 to increase the energy density of the battery device 100, so that the battery device 100 can be used in different fields, such as electric vehicles, fuel vehicles, aircraft, energy storage boxes, etc. This embodiment of the application does not limit this.

[0050] In some embodiments, multiple battery cells 121 are arranged in an array and spaced apart. This array arrangement of multiple battery cells 121 makes the battery assembly 120 structurally regular, facilitating the assembly and connection of the battery assembly 120 and the housing 110, thereby improving the production efficiency of the battery device 100. During use, the battery cells 121 generate heat. The spaced arrangement of multiple battery cells 121 in this embodiment reduces the contact area between adjacent battery cells 121, thereby preventing heat conduction between adjacent battery cells 121. Furthermore, the spaced arrangement of the battery cells 121 facilitates heat dissipation, thereby improving the heat dissipation efficiency of the battery device 100.

[0051] It should be noted that the multiple battery cells 121 are spaced apart, that is, there may be a gap between two battery cells 121, or there may be other parts between two battery cells 121 to create a gap between them. This application embodiment does not require this.

[0052] It is easy to understand that multiple battery cells 121 are concentrated in the accommodating cavity 111. After the battery cells 121 generate heat, it is difficult for the heat to dissipate. In order to improve the heat dissipation and heat dissipation effect of the battery device 100, the battery device 100 also includes a liquid cooling assembly 130. The liquid cooling assembly 130 includes a liquid guide 131, which is disposed on one side of the battery cell 121. The liquid guide 131 has at least two flow channels, and the liquid outlet 1319 of each flow channel is located on the side of the liquid guide 131 facing the battery cell 121 and communicates with the accommodating cavity 111.

[0053] The liquid guide 131 is disposed on one side of the battery cell 121. The heat generated by the battery cell 121 is conducted to the liquid guide 131, and some of the heat is absorbed by the cooling medium in the liquid guide 131 to reduce the temperature of the battery cell 121.

[0054] It is easy to understand that in the embodiments of this application, the multiple battery cells 121 are arranged in an array. The cooling medium in the liquid guide 131 is discharged into the accommodating cavity 111 through the liquid outlet 1319 of at least two flow channels. In this way, the flow channels form a flow guiding effect on the cooling medium, distributing the cooling medium to different positions in the accommodating cavity 111, so that the cooling medium quickly enters the accommodating cavity 111 and contacts the battery cells 121 to achieve the purpose of reducing the temperature of the battery cells 121.

[0055] It should be noted that the number of flow channels in this application embodiment can be two, three, or more, and this application embodiment does not require this. Furthermore, the number of liquid outlets 1319 on each flow channel can be one, two, three, or more, and multiple liquid outlets 1319 can be arranged in an array on the side wall of the liquid guide 131 facing the battery cell 121, and this application embodiment does not require this.

[0056] During use, the heat generated by multiple battery cells 121 in the battery device 100 is unevenly distributed in the accommodating cavity 111. This can easily lead to a situation where the temperature is high in the center of the battery device 100 and the temperature on the periphery is relatively low, resulting in a decrease in the heat dissipation efficiency of the battery device 100.

[0057] To address this issue, a control element 132 is provided at the inlet of the flow channel in this embodiment. The control element 132 controls the opening degree of the flow channel inlet to adjust the flow rate of the cooling medium. Thus, the opening degree of the flow channel inlet is adjusted by the control element 132, thereby adjusting the flow rate of the cooling medium. This allows more cooling medium to be introduced into the hotter parts of the battery device 100, rapidly reducing the temperature of the individual battery cells 121, resulting in a more uniform temperature distribution within the battery device 100 and improving its heat dissipation efficiency and effect.

[0058] Optionally, the liquid guide 131 has a first liquid cavity 1316 and a protrusion 1317 located in the first liquid cavity 1316, the protrusion 1317 dividing the first liquid cavity 1316 into at least two flow channels.

[0059] See Figure 4 In this embodiment, there are three flow channels. To facilitate understanding of the technical solution provided by this embodiment by those skilled in the art, the three flow channels in this embodiment are defined as: first flow channel 1310, second flow channel 1311, and third flow channel 1312. The inlet of the first flow channel 1310 is defined as the first inlet 1313, the inlet of the second flow channel 1311 is defined as the second inlet 1314, and the inlet of the third flow channel 1312 is defined as the third inlet 1315. The control element 132 is configured in a one-to-one correspondence with the inlet of the flow channel. It can be understood that there are three control elements 132 in this embodiment, which are defined as the first control element 1321, the second control element 1322, and the third control element 1323.

[0060] A protruding structure 1317 is located in the first liquid cavity 1316, and divides the first liquid cavity 1316 into a first flow channel 1310, a second flow channel 1311, and a third flow channel 1312. A first control element 1321 is provided at the first inlet 1313 to control the opening degree of the first inlet 1313, thereby regulating the flow rate of the cooling medium entering the first flow channel 1310 through the first inlet 1313. Similarly, a second control element 1322 is provided at the second inlet 1314 to control the opening degree of the second inlet 1314, thereby regulating the flow rate of the cooling medium entering the second flow channel 1311 through the second inlet 1314. A third control element 1323 is provided at the third inlet 1315 to control the opening of the third inlet 1315, thereby regulating the flow rate of the cooling medium entering the third flow channel 1312 through the third inlet 1315. In this way, the flow rate of the cooling medium in each flow channel can be independently adjusted, thereby improving the heat dissipation efficiency of the battery device 100, resulting in a more uniform temperature distribution within the battery device 100, further preventing heat concentration in the battery device 100, thus enhancing the safety of the battery device 100 and extending its service life.

[0061] See Figure 4In some embodiments, the protruding structure 1317 has a receiving portion 1318, the opening of which faces the inlet of the flow channel; the control member 132 includes a sliding portion 1324 and a driving portion 1325, the sliding portion 1324 being telescopically movable relative to the opening of the receiving portion 1318; the driving portion 1325 is connected to the sliding portion 1324 and is used to drive the sliding portion 1324 to telescopically move, thereby controlling the opening degree of the inlet of the flow channel. Thus, by accommodating the control member 132 in the receiving portion 1318, the space occupied by the control member 132 in the first liquid chamber 1316 is reduced, improving the space utilization of the first liquid chamber 1316, allowing the first liquid chamber 1316 to accommodate more cooling medium.

[0062] For example, the sliding part 1324 can be a block-shaped structural component or a plate-shaped structural component, and the driving part 1325 can be a structural component that outputs linear motion. In this way, the driving part 1325 can drive the sliding part 1324 to extend and retract relative to the opening of the receiving part 1318, thereby adjusting the opening degree of the inlet of the flow channel.

[0063] Optionally, the drive unit 1325 includes a motor and a transmission mechanism, which are connected. The motor outputs circular motion and the transmission mechanism outputs linear motion to drive the sliding unit 1324 to extend and retract.

[0064] In some embodiments, the drive unit 1325 includes a linear motor, an electric telescopic rod, etc., so that the drive unit 1325 can output linear motion and drive the sliding unit 1324 to extend and retract.

[0065] As an optional implementation, the battery device 100 has a temperature detection element (not shown) and a battery management system (not shown). The temperature detection element is disposed on the battery assembly 120 and acquires the temperature parameters of the battery assembly 120. The battery management system (BMS) is electrically connected to the temperature detection element and the control element 132. When the temperature parameter is greater than or equal to a preset temperature parameter, the battery management system controls the control element 132 to move in order to control the opening degree of the inlet of the flow channel.

[0066] For example, the temperature detection device includes a temperature sensor, a thermistor, etc., and can be disposed on the battery cells 121 of the battery assembly 120. In specific implementations, the temperature detection device can be disposed on some of the battery cells 121 in the battery assembly 120, or it can be disposed on each battery cell 121; this embodiment does not require this. The temperature parameters acquired by the temperature detection device are transmitted to the BMS. The BMS compares the temperature parameters acquired by the temperature detection device with preset temperature parameters, and when the temperature parameters are greater than or equal to the preset temperature parameters, it controls the control unit 132 to adjust the opening degree of the flow channel.

[0067] It is understood that the three control components 132 in this embodiment are all electrically connected to the BMS. Thus, the first control component 1321, the second control component 1322, and the third control component 1323 are independent of each other, allowing the opening of the corresponding first inlet 1313, second inlet 1314, and third inlet 1315 to be adjusted independently. This allows for adjustment of the flow rate of the cooling medium in the corresponding flow channels to meet different heat dissipation requirements inside the battery device 100, thereby improving the heat dissipation efficiency and effect of the battery device 100, making the heat and temperature distribution inside the battery device 100 uniform, further improving the safety of the battery device 100, and extending the service life of the battery device 100.

[0068] Combination Figure 2 , Figure 3 , Figure 6 , Figure 7 In some embodiments, the liquid cooling assembly 130 further includes a separator 133 disposed between adjacent battery cells 121; the separator 133 has a second liquid cavity and a hollow structure 1331, the second liquid cavity being connected to the liquid outlet 1319 of the flow channel; the hollow structure 1331 is connected to the second liquid cavity and the receiving cavity 111 respectively. Thus, the present application embodiment improves the heat dissipation efficiency and heat dissipation effect of the battery device 100 by providing the separator 133.

[0069] It is easy to understand that the separator 133 is provided with a first through hole 1332, which connects the second liquid chamber and the outlet 1319 of the flow channel, thereby enabling the cooling medium in the liquid guide 131 to flow into the second liquid chamber. In this embodiment, the separator 133 is placed between two adjacent battery cells 121, and there is thermal conductivity between the battery cell 121 and the separator 133. During the flow of the cooling medium, the temperature of the battery cell 121 can be reduced.

[0070] Furthermore, the separator 133 has a hollow structure 1331, which is connected to the second liquid chamber through the second through hole 1333. This allows the cooling medium from the second liquid chamber to be introduced into the receiving cavity 111. The cooling medium directly contacts the battery cell 121 in the receiving cavity 111, cooling the battery cell 121 and further improving the heat dissipation efficiency and effect of the battery device 100. During the flow of the cooling medium, the opening of the inlet of the flow channel can be adjusted according to the temperature of the battery cell 121, thereby regulating the flow rate of the cooling medium. This makes the temperature regulation of the battery device 100 more targeted, ensuring uniform temperature distribution and thus improving the heat dissipation efficiency and effect of the battery device 100.

[0071] It should be noted that the hollow structure 1331 in this application embodiment includes hollow holes, grids, etc., which are not required in this application embodiment. The shape of the orthographic projection of the hollow hole on the surface where the battery cell 121 is located can be circular, square, irregular, etc., which are not required in this application embodiment.

[0072] Combination Figures 1 to 5 Optionally, the battery device 100 further includes an inlet pipe 140 and an outlet pipe 150. The first end of the inlet pipe 140 is connected to the liquid guide 131, and the second end of the inlet pipe 140 extends to the outside of the housing 110 for connection to an external device. The outlet pipe 150 is disposed in the housing 110 to connect the accommodating cavity 111 and the outside of the housing 110. Thus, the battery device 100 can communicate with an external device through the inlet pipe 140 and the outlet pipe 150, realizing the circulation of the cooling medium.

[0073] It is easy to understand that the external devices will differ depending on the application scenario of the battery device 100. For example, when the battery device 100 is used in a vehicle, the inlet pipe 140 and outlet pipe 150 of the battery device 100 can be connected to the vehicle's liquid cooling system.

[0074] For example, when the battery device 100 is applied to an energy storage device, such as an energy storage compartment, the inlet pipe 140 and outlet pipe 150 of the battery device 100 are connected to the liquid cooling device of the energy storage device.

[0075] Combination Figure 4 and Figure 5 In some embodiments, an adapter 1320 is provided on the liquid guide 131, and the first end of the liquid inlet pipe 140 can be connected to the liquid guide 131 through the adapter 1320. Thus, the adapter 1320 facilitates the assembly and connection of the liquid inlet pipe 140 and the liquid guide 131, thereby improving the assembly efficiency of the battery device 100.

[0076] For example, the adapter 1320 can be a pipe connector, pipe plug, etc., and the embodiments of this application do not limit this.

[0077] See Figure 2 and Figure 3 In some embodiments, there are multiple battery components 120, which are arranged in an array, and liquid guides 131 are provided between adjacent battery components 120.

[0078] This embodiment of the application increases the energy density of the battery device 100 by arranging multiple battery modules 120. The array arrangement of multiple battery modules 120 results in a neat arrangement of the battery modules 120, facilitating the assembly of the battery device 100, further improving the assembly efficiency and increasing the production capacity of the battery device 100. A liquid guide 131 is provided between adjacent battery modules 120 to dissipate heat between two battery modules 120 through one liquid guide 131, improving the utilization rate of the liquid guide 131. While meeting the heat dissipation requirements of the battery device 100, the number of battery modules 120 can be increased, thereby increasing the energy density of the battery device 100 and increasing the space utilization rate of the accommodating cavity 111.

[0079] See Figure 2 , Figure 3 , Figure 6 and Figure 7 In some embodiments, the battery cell 121 has a terminal post 122 facing the top of the housing 110; in the accommodating cavity 111, the cooling medium has a liquid level that is lower than the plane containing the terminal post 122 along the direction from the bottom to the top of the housing 110. This prevents electrical conduction between the cooling medium and the battery cell 121, thereby preventing internal short circuits in the battery device 100 and improving the safety and reliability of the battery device 100.

[0080] Combination Figure 1 , Figure 2 , Figure 4 and Figure 8 In some embodiments, the housing 110 includes a body 112 and a cover 113, with the cover 113 sealed to the top of the body 112. The body 112 and the cover 113 together form a receiving cavity 111. Thus, the housing 110 facilitates the assembly of the battery assembly 120 and the liquid cooling assembly 130 within the housing 110, thereby improving the assembly efficiency and production capacity of the battery device 100. Furthermore, the sealed connection between the cover 113 and the body 112 prevents leakage of the cooling medium, further enhancing the safety of the battery device 100 in application.

[0081] See Figure 8 For example, the battery device 100 also includes a seal 180, which is disposed at the connection between the cover 113 and the body 112 to seal the connection between the cover 113 and the body 112 when the cover 110 and the body 112 are connected, thereby reducing the probability of cooling medium leakage and improving the sealing and safety of the battery device 100.

[0082] It should be noted that the sealing element 180 can be a sealing gasket, sealing ring, etc., and this application embodiment does not require it to be.

[0083] Combination Figure 1 , Figure 2 , Figure 4 and Figure 8 In some embodiments, the battery device 100 further includes a fixing member 160, which is disposed in the receiving cavity 111 and surrounds the periphery of the battery assembly 120. Thus, through the cooperative connection between the fixing member 160 and the battery assembly 120, the battery assembly 120 remains stable within the housing 110, preventing shaking of the battery assembly 120. This stabilizes the structure and electrical connections of the battery device 100, thereby improving the operational reliability and stability of the battery device 100.

[0084] See Figure 8 In some embodiments, a support member 170 is provided inside the housing 110, and a fixing member 160 is engaged with the support member 170 so that the fixing member 160 remains stable within the accommodating cavity 111.

[0085] For example, see Figure 8 The support member 170 has a groove 171, and the fixing member 160 has a protrusion 161. The fixing member 160 is connected to the support member 170 through the engagement of the protrusion 161 and the groove 171. It can be understood that the connection between the protrusion 161 and the groove 171 restricts the positional movement of the fixing member 160 relative to the support member 170, thus preventing the battery assembly 120 from shaking and further improving the structural stability of the battery device 100. Furthermore, through the engagement of the protrusion 161 and the groove 171, any leakage of cooling medium will be concentrated in the groove 171, thereby reducing cooling medium leakage and further improving the sealing and safety of the battery device 100.

[0086] It should be noted that the cooling medium in the embodiments of this application includes water, aqueous solution and cooling oil, etc., and the embodiments of this application do not require this.

[0087] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0088] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0089] It should be readily understood that the terms “on,” “above,” and “on top of” in this application should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0090] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90° or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery device, characterized in that, include: A housing (110) having a receiving cavity (111); A battery assembly (120) is disposed in the accommodating cavity (111); the battery assembly (120) includes a plurality of battery cells (121), which are arranged in an array and spaced apart. A liquid cooling assembly (130) includes a liquid guide (131) disposed on one side of the battery cell (121). The liquid guide (131) has at least two flow channels, and the outlet (1319) of each flow channel is located on the side of the liquid guide (131) facing the battery cell (121) and communicates with the accommodating cavity (111). A control element (132) is provided at the inlet of the flow channel to control the opening degree of the inlet of the flow channel to adjust the flow rate of the cooling medium.

2. The battery device according to claim 1, characterized in that, The liquid guide (131) has a first liquid cavity (1316) and a protrusion (1317) located in the first liquid cavity (1316), the protrusion (1317) dividing the first liquid cavity (1316) into at least two flow channels.

3. The battery device according to claim 2, characterized in that, The protruding structure (1317) has a receiving portion (1318) with the opening of the receiving portion (1318) facing the inlet of the flow channel; The control element (132) includes a sliding part (1324) and a driving part (1325). The sliding part (1324) is retractably disposed relative to the opening of the receiving part (1318). The driving part (1325) is connected to the sliding part (1324) and is used to drive the sliding part (1324) to retract and move, so as to control the opening degree of the inlet of the flow channel.

4. The battery device according to any one of claims 1-3, characterized in that, The battery device has a temperature detection element and a battery management system. The temperature detection element is disposed on the battery assembly (120) and acquires the temperature parameters of the battery assembly (120). The battery management system is electrically connected to the temperature detection device and the control device (132); When the temperature parameter is greater than or equal to the preset temperature parameter, the battery management system controls the movement of the control unit (132) to control the opening degree of the inlet of the flow channel.

5. The battery device according to any one of claims 1-3, characterized in that, The liquid cooling assembly (130) further includes a separator (133) disposed between adjacent battery cells (121); the separator (133) has a second liquid cavity and a hollow structure (1331), the second liquid cavity being connected to the liquid outlet (1319) of the flow channel; the hollow structure (1331) being connected to the second liquid cavity and the receiving cavity (111) respectively.

6. The battery device according to any one of claims 1-3, characterized in that, It also includes an inlet pipe (140) and an outlet pipe (150), the first end of the inlet pipe (140) being connected to the liquid guide (131), and the second end of the inlet pipe (140) extending to the outside of the housing (110) and used for connection with external devices; The liquid outlet pipe (150) is disposed on the housing (110) to connect the accommodating cavity (111) and the outside of the housing (110).

7. The battery device according to any one of claims 1-3, characterized in that, There are multiple battery components (120), which are arranged in an array, and the liquid guide (131) is provided between adjacent battery components (120).

8. The battery device according to any one of claims 1-3, characterized in that, The battery cell (121) has a terminal (122) facing the top of the housing (110); In the accommodating cavity (111), the cooling medium has a liquid level that is lower than the plane of the pole (122) along the direction from the bottom to the top of the housing (110).

9. The battery device according to any one of claims 1-3, characterized in that, The box (110) includes a body (112) and a lid (113). The lid (113) is sealed to the top of the body (112). The body (112) and the lid (113) together form the accommodating cavity (111).

10. The battery device according to any one of claims 1-3, characterized in that, It also includes a fastener (160) disposed in the receiving cavity (111) and surrounding the periphery of the battery assembly (120).

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