Battery and electric equipment

Abstract

The utility model relates to a battery and electric equipment. Comprising a box body with an accommodating cavity; the plurality of battery cells are mounted in the accommodating cavity in a manner that poles face downwards; the heat exchange assembly is located at the bottom of the containing cavity, the top end of the heat exchange assembly forms the inner bottom face of the box body, a first groove for avoiding the pole column is formed in the side, facing the battery cell in the Z direction, of the heat exchange assembly, and a plurality of heat exchange flow channels extending in the X direction are arranged in the heat exchange assembly so as to conduct heat exchange on the battery cell; a preset first gap is formed between at least part of the heat exchange assemblies and the box body. According to the technical scheme, the thermal management effect of the battery assembly can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery and an electric device. BACKGROUND

[0002] In the existing power battery industry, fast charging technology is developing rapidly. When the battery cell is fast charged, more heat will be generated in a short time, which will cause the temperature of the battery assembly to rise rapidly, and charging failure and safety hazards may occur. Therefore, it is urgent to improve the heat dissipation performance of the battery. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the present application provides a battery and an electric device to solve at least one problem in the background art.

[0004] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0005] In a first aspect, the present application provides a battery thermal management structure, comprising:

[0006] a box body having a containing cavity;

[0007] a plurality of battery cells installed in the containing cavity with the pole column facing downward;

[0008] a heat exchange assembly located at the bottom of the containing cavity, the top end of the heat exchange assembly forming the inner bottom surface of the box body, the heat exchange assembly being provided with a first groove on one side of the battery cell along the Z direction to avoid the pole column, and a plurality of heat exchange flow channels extending along the X direction being arranged in the heat exchange assembly to exchange heat with the battery cell; at least part of the heat exchange assembly is spaced apart from the box body by a predetermined first gap.

[0009] Optionally, the heat exchange assembly comprises a first flow channel plate, a second flow channel plate and a third flow channel plate stacked in sequence from top to bottom along the Z direction, and the first flow channel plate and the second flow channel plate are formed with the first gap between the two sides along the Y direction and the box body.

[0010] Optionally, at least one of the first gaps is provided with a buffer member, and the buffer member is connected with the inner wall of the box body in a fit manner; the thermal conductivity of the buffer member is lower than that of the box body, and the elastic modulus of the buffer member is greater than that of the box body.

[0011] Optionally,

[0012] The heat exchange flow channels in the first flow channel plate include first flow channels and second flow channels, a plurality of the first flow channels are arranged along the Y direction and spaced apart from the first grooves, the second flow channels are located at positions corresponding to shoulder positions on both sides of the battery cell along the Y direction, and the height of the second flow channels is higher than the height of the first flow channels.

[0013] The heat exchange flow channels in the third flow channel plate include a plurality of third flow channels arranged along the Y direction and spaced apart.

[0014] The second flow channel plate is composed of a plurality of reinforcing ribs, a plurality of the reinforcing ribs are arranged along the Z direction and abut between the first flow channel plate and the third flow channel plate to form the heat exchange flow channels in the second flow channel plate, the heat exchange flow channels in the second flow channel plate include a plurality of fourth flow channels arranged along the Y direction and spaced apart, and at least part of the fourth flow channels are located directly below the first grooves, the first flow channels and the second flow channels.

[0015] Optionally, each of the heat exchange flow channels is directly or indirectly communicated, and at least one fluid inlet and fluid outlet communicating with the outside are arranged.

[0016] Optionally, the battery further includes:

[0017] A front current collector located in the accommodation cavity and communicated with one end of the heat exchange assembly, the front current collector includes a liquid inlet pipe communicated with the fluid inlet and a liquid outlet pipe communicated with the fluid outlet.

[0018] A rear current collector located in the accommodation cavity and communicated with the other end of the heat exchange assembly, the rear current collector includes a plurality of circulation pipes communicated with at least two heat exchange flow channels with different flow directions, so that the fluid flowing into the heat exchange flow channels can return to the front current collector and be discharged.

[0019] Optionally, the pole of the battery cell is provided with at least two protruding portions along the Z direction towards one side of the heat exchange assembly, and the protruding portions are accommodated in the first grooves.

[0020] Optionally, the battery further includes an electrical connection assembly, and the electrical connection assembly is detachably connected with the pole.

[0021] Optionally, the battery further includes a heat conduction assembly, the heat conduction assembly abuts the electrical connection assembly at one end along the Z direction and abuts the heat exchange assembly at the other end along the Z direction.

[0022] In a second aspect, the embodiments of the present application provide a power utilization device including any one of the batteries as described in the above claims.

[0023] The battery and electrical device provided in this application embodiment include: a housing with a receiving cavity; multiple battery cells installed in the receiving cavity with their terminals facing downwards; a heat exchange assembly located at the bottom of the receiving cavity, the top of the heat exchange assembly forming the inner bottom surface of the housing; a first groove that avoids the terminals is formed on the side of the heat exchange assembly facing the battery cells along the Z direction; multiple heat exchange channels extending along the X direction are provided inside the heat exchange assembly to exchange heat with the battery cells; at least a portion of the heat exchange assembly is spaced from the housing by a predetermined first gap. It can be seen that the battery and electrical device of this application embodiment, with multiple heat exchange channels extending along the X direction inside the heat exchange assembly, can dissipate heat or heat the battery cells above the heat exchange assembly; and at least a portion of the heat exchange assembly is spaced from the housing by a predetermined first gap to prevent the heat or cold energy of the heat exchange assembly from being transferred to the housing through conduction, thereby improving the heat exchange efficiency of the heat exchange assembly and thus improving the thermal management effect of the battery assembly. Therefore, the battery and electrical device of this application embodiment can improve the thermal management effect of the battery assembly.

[0024] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0026] Figure 1 A schematic diagram of a battery provided in an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of a battery cell provided in an embodiment of this application;

[0028] Figure 3 This is a schematic diagram of the battery cell and casing provided in an embodiment of this application;

[0029] Figure 4 A schematic diagram of the cross-section of a battery provided in an embodiment of this application;

[0030] Figure 5 A cross-sectional schematic diagram of a heat exchange component in a battery provided in an embodiment of this application;

[0031] Figure 6 for Figure 4 A magnified view of point A in the diagram;

[0032] Figure 7 for Figure 4 A magnified view of point B in the diagram;

[0033] Figure 8 for Figure 4 A magnified view of point C in the diagram;

[0034] Figure 9 A schematic diagram of a current collector in a battery provided in an embodiment of this application;

[0035] Figure 10 for Figure 9 A magnified view of a portion of point D in the middle;

[0036] Figure 11 for Figure 9 A magnified view of a portion of point E in the middle.

[0037] Explanation of reference numerals in the attached figures:

[0038] 10. Housing; 11. Side baffle; 20. Battery cell; 21. Protrusion; 23. Shoulder; 30. Heat exchange assembly; 301. First groove; 31. First flow channel; 32. Second flow channel; 33. Third flow channel; 34. Fourth flow channel; 351. Front collector; 3511. Liquid inlet pipe; 3512. Liquid outlet pipe; 352. Rear collector; 361. Liquid inlet; 362. Liquid outlet; 37. First flow channel plate; 38. Second flow channel plate; 381. Reinforcing rib; 39. Third flow channel plate; 40. First gap; 50. Buffer; 60. Electrical connection assembly; 70. Heat conduction assembly. Detailed Implementation

[0039] To make the technical solution and beneficial effects of this application more apparent and understandable, a detailed description is provided below by listing specific embodiments. The accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.

[0040] In the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. In other words, they should not be construed as limitations on this application.

[0041] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating the relative importance of the indicated features or the number of indicated technical features. Therefore, a feature specified as "first" or "second" may explicitly include at least one of those features. In the description of this application, "multiple" means at least two, such as two, three, etc.; "several" means at least one, such as one, two, three, etc., unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly defined, the terms "installation," "connection," "linking," "fixing," "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] In this application, unless otherwise expressly defined, the terms "above," "on top of," "over," "above," "below," "below," "below," or "below" for "first feature over second feature" can refer to the first and second features being in direct contact, or to the first and second features being in indirect contact through an intermediate medium. Furthermore, "above," "over," and "below" for "first feature over second feature" can mean the first feature is directly above or diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature. Similarly, "below," "below," and "below" for "first feature over second feature" can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0044] To fully understand this application, detailed steps and structures will be presented in the following description to illustrate the technical solution of this application. Preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other implementation methods.

[0045] To address the technical problems in related technologies, embodiments of this application provide a battery. (See reference...) Figures 1-4 The battery includes:

[0046] Box 10 has a receiving cavity;

[0047] Multiple battery cells 20 are installed in the accommodating cavity with the terminals facing downwards;

[0048] A heat exchange assembly 30 is located at the bottom of the accommodating cavity. The top of the heat exchange assembly 30 forms the inner bottom surface of the housing 10. The heat exchange assembly 30 has a first groove 301 (reference) along the Z direction towards the battery cell 20 to avoid the electrode post. Figure 6 The heat exchange assembly 30 is provided with multiple heat exchange channels extending along the X direction to exchange heat with the battery cell 20; at least a portion of the heat exchange assembly 30 is spaced from the housing 10 by a predetermined first gap 40.

[0049] Understandably, the battery in this application embodiment is a power battery, specifically a battery module or a battery pack, which is composed of multiple cells 20.

[0050] The battery pack can be in the form of direct integration of cells 20, i.e., CTP (Cell To Pack). The housing can be rectangular in shape, including four side baffles 11 that surround the accommodating cavity.

[0051] Understandably, the electrode post is installed with its orientation towards the inner bottom surface of the receiving cavity, which can be described as the battery cell 20 being inverted or installed upside down into the casing. This is safer and also facilitates the installation of the heat exchange assembly 30.

[0052] Understandably, a heat exchange medium can be introduced into the heat exchange channel for heat dissipation or heating. The heat exchange medium can be a liquid or a gas. In this embodiment, the heat exchange medium is a liquid, specifically water.

[0053] Understandably, the inner bottom surface of the housing 10 is formed by the heat exchange assembly 30. This results in a simpler structure, more stable heat exchange performance, and lower cost.

[0054] Understandably, the above description of directions is based on the battery's orientation when the electrical device is operating normally, such as the orientation of a power battery when a car is in normal motion. Specifically, referring to the attached diagram, the Z direction can be the height direction of the battery, the X direction can be the length direction of the battery, and the Y direction described below can be the width direction of the battery.

[0055] It should be noted that the reference Figure 4 and Figure 6 The heat exchange component 30 is spaced from the housing 10 by a predetermined first gap 40, so that the heat exchange component 30 does not contact the side wall of the housing 10. This structural arrangement can reduce heat or cold loss and improve the thermal management effect of the battery pack. The first gap 40 is in Figure 6 The size in the code is marked as G1.

[0056] The battery in this embodiment has multiple heat exchange channels extending in the X direction within the heat exchange assembly 30, which can dissipate heat or heat the battery cell 20 above the heat exchange assembly 30; and at least a portion of the heat exchange assembly 30 is spaced from the housing 10 by a predetermined first gap 40 to prevent the heat from the heat exchange assembly 30 from being transferred to the housing 10 by conduction, thereby improving the heat exchange efficiency of the heat exchange assembly 30 and thus improving the thermal management effect of the battery assembly.

[0057] To simplify the explanation, we will use heat dissipation as an example: cooling air is introduced into the heat exchange channel of the heat exchange component 30 to dissipate heat from the battery cell 20. It can be understood that if heating is required, the opposite operation can be performed, such as introducing heat into the heat exchange channel.

[0058] In other embodiments of this application, reference is made to Figure 5 The heat exchange assembly 30 includes a first flow channel plate 37, a second flow channel plate 38 and a third flow channel plate 39 stacked sequentially from top to bottom along the Z direction. The first flow channel plate 37 and the second flow channel plate 38 form the first gap 40 between their sides along the Y direction and the housing 10.

[0059] This design facilitates the arrangement of multi-layer heat exchange channels, improving heat exchange efficiency, and is also more suitable for downward-facing battery terminal installation. Furthermore, it makes the structure of the heat exchange assembly 30 more robust.

[0060] Understandably, the third flow channel plate 39 can be in direct contact with the housing 10, making the bottom surface of the housing 10 relatively closed.

[0061] In other embodiments of this application, reference is made to Figure 6 At least one of the first gaps 40 is provided with a buffer element 50, which is in close contact with the inner wall of the housing 10; the thermal conductivity of the buffer element 50 is lower than that of the housing 10, and the elastic modulus of the buffer element 50 is greater than that of the housing 10.

[0062] Understandably, the buffer 50 has a relatively low thermal conductivity, which reduces the conduction of cold energy and the loss of cold energy in the heat exchange component 30. Specifically, the housing 10 can be made of metal, while the buffer 50 can be made of non-metallic material.

[0063] Understandably, the buffer 50 has a high elastic modulus, which can serve as a buffer and vibration damper. For example, when a battery is installed in a car, it can reduce the vibration of the battery cell 20 while the car is in motion. Specifically, the material of the buffer 50 can be rubber.

[0064] In other embodiments of this application, reference is made to Figures 6-8The heat exchange channels within the first flow channel plate 37 include a first flow channel 31 and a second flow channel 32. A plurality of first flow channels 31 are spaced apart along the Y direction to avoid the first groove 301. The positions of the second flow channels 32 are located at the shoulder 23 positions on both sides of the battery cell 20 along the Y direction, and the height of the second flow channel 32 is higher than the height of the first flow channel 31.

[0065] That is, the first flow channel 31 is offset from the first groove 301. In this way, the first flow channel 31 can be set on one side of the electrode post to cool the electrode post from one side, or to cool the cell 20 body on one side of the electrode post.

[0066] Specifically, the first flow channel 31 is located between the two terminals, and in addition to cooling the inner side of the terminals, it also cools the cell body 20 between the two terminals. The second flow channel 32 cools the outer side of the terminals and also cools the cell body 20 outside the terminals, so that the entire cell 20 has good heat dissipation conditions.

[0067] The heat exchange channels within the third flow channel plate 39 include a plurality of third flow channels 33 spaced apart along the Y direction;

[0068] The second flow channel plate 38 is composed of a plurality of reinforcing ribs 381, which abut against the first flow channel plate 37 and the third flow channel plate 39 along the Z direction to form the heat exchange channel within the second flow channel plate 38. The heat exchange channel within the second flow channel plate 38 includes a plurality of fourth flow channels 34 spaced apart along the Y direction, at least a portion of which are located directly below the first groove 301, the first flow channel 31 and the second flow channel 32.

[0069] Both the second flow channel plate 38 and the third flow channel plate 39 are equipped with heat exchange channels. This further improves heat dissipation capacity. For example, the fourth flow channel 34 of the second flow channel plate 38 can dissipate heat at the end of the electrode, reducing its temperature. It can also dissipate heat from the first flow channel 31 and the second flow channel 32, improving their heat dissipation capacity. Similarly, the third flow channel 33 of the third flow channel plate 39 can dissipate heat from the fourth flow channel 34, improving its heat dissipation capacity. Therefore, the overall heat dissipation capacity of the heat exchange assembly 30 is improved, and its heat dissipation performance is made more stable.

[0070] In some other embodiments of this application, each of the heat exchange channels is directly or indirectly connected to the outside and is provided with at least one fluid inlet and fluid outlet connected to the outside.

[0071] In this way, the flow of the heat exchange medium in the heat exchange channel can be controlled to flow as needed, or to circulate, and new cooling capacity can be continuously replenished.

[0072] In other embodiments of this application, reference is made to Figures 9-11 The battery further includes:

[0073] The front collector 351 is located in the accommodating cavity and is connected to one end of the heat exchange assembly 30. The front collector 351 includes an inlet pipe 3511 connected to the fluid inlet and a drain pipe 3512 connected to the fluid outlet.

[0074] The rear collector 352 is located within the accommodating cavity and communicates with the other end of the heat exchange assembly 30. The rear collector 352 includes a plurality of circulation pipes that connect to at least two heat exchange channels with different flow directions, so that the fluid flowing into the heat exchange channels can return to the front collector 351 and be discharged.

[0075] This makes the flow of the heat exchange medium more orderly, the structure simple, and the maintenance easy.

[0076] Specifically, the inlet pipe 3511 and the outlet pipe 3512 extend through the side baffle 11, forming an inlet 361 and an outlet 362 for inputting or discharging the heat exchange medium. Specifically, the inlet 361 and the outlet 362 are on the same side of the side baffle 11 and are relatively close to each other for ease of assembly and maintenance. More specifically, pipe fittings can be installed at the inlet 361 and the outlet 362 for easy connection of pipes.

[0077] In some other embodiments of this application, the electrode of the battery cell 20 is provided with at least two protrusions 21 along the Z direction toward the side of the heat exchange assembly 30, and the protrusions 21 are accommodated in the first groove 301.

[0078] That is, the battery cell 20 is installed in an inverted position, and the positive and negative terminals of the battery cell 20 are located on the same side. For example, the terminal structure can be in the form of a "mountain" shape or a "two-terminal" shape. The first groove 301 is provided corresponding to the structure of the battery cell 20.

[0079] In other embodiments of this application, reference is made to Figure 8 The battery also includes an electrical connection component 60, which is detachably connected to the terminal post.

[0080] The electrical energy of the battery cell 20 is extracted through the electrical connection component 60. The detachable connection makes installation and maintenance easier.

[0081] In other embodiments of this application, the battery further includes a thermally conductive component 70, one end of which abuts against the electrical connection component 60 in the Z direction, and the other end of which abuts against the heat exchange component 30 in the Z direction.

[0082] This can further improve the heat dissipation effect. Specifically, the heat-conducting component 70 can be made of metal materials with high thermal conductivity, such as copper or aluminum, or non-metallic materials such as graphite or ceramics.

[0083] This application also provides an electrical device, including the battery described above.

[0084] Specifically, the electrical equipment can be a car. The heat exchange medium in the heat exchange assembly 30 can exchange heat with the car's air conditioning system to achieve heat dissipation or heating.

[0085] The electrical equipment in the application embodiment has multiple heat exchange channels extending in the X direction in the heat exchange component 30, which can dissipate heat or heat the battery cell 20 above the heat exchange component 30; and at least part of the heat exchange component 30 is spaced apart from the housing 10 by a predetermined first gap 40 to prevent the heat or cold of the heat exchange component 30 from being transferred to the housing 10 by conduction, thereby improving the heat exchange efficiency of the heat exchange component 30 and thus improving the thermal management effect of the battery assembly.

[0086] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations of the technical solutions contained in this application. Various modifications and changes can be made to the above embodiments without departing from the scope of this application. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of this application that may not be explicitly described. Therefore, the above embodiments merely illustrate several implementations of this application and do not limit the scope of protection of this patent application.

Claims

1. A battery, characterized in that, The battery includes: The housing (10) has a receiving cavity; Multiple battery cells (20) are installed in the accommodating cavity with the terminals facing downwards; A heat exchange assembly (30) is located at the bottom of the accommodating cavity. The top of the heat exchange assembly (30) forms the inner bottom surface of the housing (10). The heat exchange assembly (30) has a first groove (301) that avoids the electrode post on the side facing the battery cell (20) along the Z direction. The heat exchange assembly (30) is provided with multiple heat exchange channels extending along the X direction to perform heat exchange on the battery cell (20). At least a portion of the heat exchange assembly (30) is spaced from the housing (10) by a predetermined first gap (40).

2. The battery according to claim 1, characterized in that, The heat exchange assembly (30) includes a first flow channel plate (37), a second flow channel plate (38) and a third flow channel plate (39) stacked sequentially from top to bottom along the Z direction. The first flow channel plate (37) and the second flow channel plate (38) form the first gap (40) between their two sides along the Y direction and the housing (10).

3. The battery according to claim 2, characterized in that, At least one of the first gaps (40) is provided with a buffer (50), the buffer (50) being fitted and connected to the inner wall of the box (10); the thermal conductivity of the buffer (50) is lower than that of the box (10), and the elastic modulus of the buffer (50) is greater than that of the box (10).

4. The battery according to claim 2, characterized in that, The heat exchange channels in the first flow channel plate (37) include a first flow channel (31) and a second flow channel (32). A plurality of first flow channels (31) are arranged at intervals along the Y direction to avoid the first groove (301). The position of the second flow channel (32) corresponds to the shoulder position on both sides of the cell (20) along the Y direction, and the height of the second flow channel (32) is higher than the height of the first flow channel (31). The heat exchange channels within the third flow channel plate (39) include a plurality of third flow channels (33) spaced apart along the Y direction; The second flow channel plate (38) is composed of a plurality of reinforcing ribs (381), which abut against the first flow channel plate (37) and the third flow channel plate (39) along the Z direction to form the heat exchange channel in the second flow channel plate (38). The heat exchange channel in the second flow channel plate (38) includes a plurality of fourth channels (34) spaced apart along the Y direction. At least a portion of the fourth channels (34) are located directly below the first groove (301), the first channel (31) and the second channel (32).

5. The battery according to claim 4, characterized in that, Each of the heat exchange channels is directly or indirectly connected to the outside and is provided with at least one fluid inlet and fluid outlet connected to the outside.

6. The battery according to claim 5, characterized in that, The battery also includes: A front collector (351) is located in the accommodating cavity and communicates with one end of the heat exchange assembly (30). The front collector (351) includes an inlet pipe (3511) communicating with the fluid inlet and a drain pipe (3512) communicating with the fluid outlet. The rear collector (352) is located within the accommodating cavity and communicates with the other end of the heat exchange assembly (30). The rear collector (352) includes a plurality of circulation pipes that connect at least two heat exchange channels with different flow directions, so that fluid flowing into the heat exchange channels can return to the front collector (351) and be discharged.

7. The battery according to any one of claims 1-6, characterized in that, The electrode of the battery cell (20) is provided with at least two protrusions (21) facing the heat exchange assembly (30) along the Z direction, and the protrusions (21) are accommodated in the first groove (301).

8. The battery according to claim 7, characterized in that, The battery also includes an electrical connection assembly (60) which is detachably connected to the terminal post.

9. The battery according to claim 8, characterized in that, The battery also includes a thermally conductive component (70), which abuts against the electrical connection component (60) at one end in the Z direction and against the heat exchange component (30) at the other end in the Z direction.

10. An electrical appliance, characterized in that, Includes the battery as described in any one of claims 1 to 9.

Images