Battery fixing structure and battery pack

Abstract

The utility model provides a battery fixing structure and a battery pack. The battery fixing structure is used for fixing a battery module; the battery fixing structure comprises a battery box, a cooling piece, a mounting piece and a connecting piece, the battery box is used for accommodating a battery module; the cooling piece is located in the battery box and connected to the battery box, and the side, away from the battery box, of the cooling piece is used for containing the battery module in the first direction; the mounting piece is arranged on one side, far away from the cooling piece, of the battery box; the connecting piece is connected with the cooling piece and the mounting piece, and the battery module is clamped between the mounting piece and the cooling piece.

Description

Technical Field

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

[0002] A battery pack typically consists of a battery box and battery modules fixed inside the battery box. The battery modules are mostly fixed to the internal structure of the battery box using adhesive bonding. However, this adhesive bonding method has two drawbacks: firstly, the long curing time of the adhesive reduces production efficiency; secondly, it makes it difficult to separate the battery modules from the internal structure of the box during subsequent recycling, thus affecting the recycling process. Utility Model Content

[0003] This application provides a battery fixing structure and a battery pack to solve the problems of low battery pack assembly efficiency and difficulty in recycling battery modules in the known technology.

[0004] This application provides a battery fixing structure for fixing a battery module inside a battery box; the battery fixing structure includes a battery box, a cooling component, a mounting component, and a connector; the battery box is used to house the battery module; the cooling component is located inside the battery box and is connected to the battery box; along a first direction, the side of the cooling component away from the battery box is used to place the battery module; the mounting component is located on the side of the battery box away from the cooling component; the connector connects the cooling component and the mounting component, and the battery module is clamped between the mounting component and the cooling component.

[0005] In one possible implementation, mounting portions are provided on both opposite sides of the mounting member along the second direction, and the second direction intersects with the first direction;

[0006] Along the second direction, the end of the mounting portion away from the mounting member extends beyond the battery module, and the connector connects the cooling member and the portion of the mounting portion that extends beyond the battery module.

[0007] In one possible implementation, the mounting portion extends beyond the battery module and has a first connection hole, the cooling component has a second connection hole, and the connector passes through the first connection hole and the second connection hole to connect the mounting portion and the cooling component.

[0008] In one possible implementation, the cooling component has a cooling cavity inside, and a reinforcing member is provided inside the cooling component. The reinforcing member connects two inner walls of the cooling cavity that are disposed opposite to each other along the first direction, and is used to divide the cooling cavity into at least two cooling sub-cavities.

[0009] Along the first direction, the projection of the second connecting hole onto the battery box is located within the projection of the reinforcing member onto the battery box.

[0010] In one possible implementation, the connectors are provided in two sets along a second direction, with the two sets of connectors spaced apart on opposite sides of the battery module, and the second direction intersecting the first direction;

[0011] Each set of connectors includes a plurality of connectors spaced apart along a third direction, which intersects the first direction and the second direction.

[0012] In one possible implementation, the battery module has a limiting protrusion on the side away from the cooling component, and the mounting component has a limiting groove, in which the limiting protrusion is received.

[0013] In one possible implementation, the limiting groove is provided on both opposite sides of the mounting member along the second direction, and the second direction intersects with the first direction;

[0014] Each of the limiting grooves contains a limiting protrusion, and the groove wall of the limiting groove abuts against the limiting protrusion to limit the battery module at least in the second direction and the third direction, the third direction intersecting the second direction and the first direction.

[0015] This application also provides a battery pack, including a battery module and the aforementioned battery fixing structure, wherein the battery module is fixed to the battery box by the battery fixing structure.

[0016] In one possible implementation, the battery module includes:

[0017] Multiple individual battery cells are arranged sequentially along a third direction;

[0018] A plurality of first conductive elements are provided corresponding to a plurality of said individual cells, and each first conductive element is electrically connected to the anode structure of one said individual cell and the cathode structure of another adjacent said individual cell.

[0019] In one possible implementation, the battery pack further includes a second conductive element electrically connected to a plurality of the first conductive elements.

[0020] In the battery fixing structure of this application, the battery module is placed on the cooling component, and the mounting component is located on the side of the battery module away from the cooling component. The mounting component is fixed to the cooling component by a connector, thereby clamping the battery module between the mounting component and the cooling component. Compared with adhesive bonding, this fixing method can directly fix the battery module, avoiding the long assembly time caused by glue curing. Furthermore, the battery module can be directly separated from the cooling component by removing the connector, facilitating the recycling of the battery module. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the battery pack of this application in one embodiment.

[0022] Figure 2 This is a schematic diagram of the battery fixing structure in one embodiment of the present application.

[0023] Figure 3 for Figure 2 An exploded view of the battery fixing structure in one embodiment.

[0024] Figure 4 for Figure 2 An exploded view of the cooling element in one embodiment of the battery fixing structure.

[0025] Figure 5 for Figure 4 A schematic diagram of the internal structure of the cooling element in one embodiment of the battery fixing structure.

[0026] Figure 6 This is a top view of one embodiment of the battery fixing structure of this application.

[0027] Figure 7 for Figure 6 A partially enlarged schematic diagram of region A corresponding to the battery fixing structure.

[0028] Explanation of key component symbols:

[0029] Battery pack 200

[0030] Battery fixing structure 100

[0031] First direction Z

[0032] Second direction X

[0033] Third direction Y

[0034] Battery Box 10

[0035] Base plate 11

[0036] Side panel 12

[0037] Top plate 13

[0038] Battery Module 20

[0039] 21 single cell

[0040] Battery body 211

[0041] Anode structure 212

[0042] Cathode structure 213

[0043] Limiting protrusion 214

[0044] Groove 2140

[0045] First conductive element 22

[0046] Extended protrusion 220

[0047] Second conductive element 23

[0048] Clamp 24

[0049] Storage space 25

[0050] Cooling component 30

[0051] Cooling chamber 31

[0052] Cooling sub-cavity 311

[0053] Reinforcing component 32

[0054] partition 33

[0055] Second connecting hole 34

[0056] Sealing structure 35

[0057] Inlet 36

[0058] Outlet 37

[0059] Installation part 40

[0060] Installation section 41

[0061] First connecting hole 410

[0062] Limiting groove 42

[0063] Connector 50

[0064] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0065] The following description will refer to the accompanying drawings to provide a more complete picture of the present application. The drawings illustrate exemplary embodiments of the present application. However, the present application may be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals denote the same or similar components.

[0066] The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to limit the application. As used herein, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” are intended to also include the plural forms. Furthermore, when used herein, “comprising” and / or “including” and / or “having,” integers, steps, operations, components, and / or components, but does not exclude the presence or addition of one or more other features, regions, integers, steps, operations, components, and / or groups thereof.

[0067] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. Furthermore, unless expressly defined herein, terms such as those defined in a general dictionary should be interpreted as having the same meaning as they have in the relevant art and in the content of this application, and will not be interpreted as having an idealized or overly formal meaning.

[0068] The specific embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0069] like Figures 1 to 3 As shown, this embodiment provides a battery pack 200, including a battery module 20 and a battery fixing structure 100. The battery fixing structure 100 includes a battery case 10, and the battery module 20 is fixed inside the battery case 10 via the battery fixing structure 100. A receiving cavity is provided inside the battery case 10, and the battery module 20 is fixed inside the receiving cavity to protect the battery module 20 through the battery case 10.

[0070] In this embodiment, the battery module 20 includes a plurality of individual battery cells 21 and a plurality of first conductive elements 22.

[0071] Along the third direction Y, multiple individual battery cells 21 are arranged sequentially, and any two adjacent individual battery cells 21 abut against each other to avoid gaps between adjacent individual battery cells 21, which would cause the battery module 20 to increase in size.

[0072] Specifically, the battery module 20 also includes a clamp 24, which surrounds the outer periphery of the multiple individual batteries 21 to fix the multiple individual batteries 21 and prevent the individual batteries 21 from shaking.

[0073] Each individual battery cell 21 includes a battery body 211, an anode structure 212, and a cathode structure 213. The battery body 211 is positioned along a second direction X, and the anode structure 212 and cathode structure 213 are disposed on the top surface of the battery body 211. Along the second direction X, the anode structure 212 and cathode structure 213 are spaced apart. Furthermore, along a third direction Y, the anode structure 212 and cathode structure 213 of each individual battery cell 21 are staggered to facilitate electrical connection between the anode structure 212 and cathode structure 213 of adjacent individual batteries 21.

[0074] Multiple first conductive elements 22 are correspondingly arranged with multiple individual cells 21. The multiple first conductive elements 22 are arranged in two groups, and the material of the first conductive elements 22 is conductive material such as aluminum. The two groups of first conductive elements 22 are spaced apart along the second direction X, so that the anode structure 212 of each individual cell 21 is electrically connected to the cathode structure 213 of an adjacent individual cell 21 through a first conductive element 22 in one group, and the cathode structure 213 of each individual cell 21 is electrically connected to the anode structure 212 of an adjacent individual cell 21 through a first conductive element 22 in the other group, thereby achieving electrical connection between any two adjacent individual cells 21. Along the third direction Y, the multiple first conductive elements 22 of the same group are spaced apart, so that an accommodating space 25 is formed between any two adjacent first conductive elements 22.

[0075] In this embodiment, the battery pack 200 further includes a second conductive element 23. The second conductive element 23 is made of a conductive material such as aluminum, and is electrically connected to multiple first conductive elements 22. The second conductive element 23 is elongated, and its extension direction is parallel to the third direction Y. The second conductive element 23 is located between two sets of first conductive elements 22, and is electrically connected to each of the two types of first conductive elements 22 to connect the individual battery cells 21 in series.

[0076] like Figures 1 to 3 As shown, this embodiment also provides a battery fixing structure 100 for fixing the battery module 20.

[0077] For ease of reading, this application introduces the terms first direction Z, second direction X, and third direction Y to describe the embodiments of this application. The first direction Z, second direction X, and third direction Y can be three non-parallel straight lines in space; further, the first direction Z, second direction X, and third direction Y can be three mutually perpendicular directions in a three-dimensional coordinate system (a three-dimensional Cartesian coordinate system). In subsequent embodiments, the first direction Z is described as the Z-axis direction of the three-dimensional coordinate system, the second direction X as the X-axis direction of the three-dimensional coordinate system, and the third direction Y as the Y-axis direction of the three-dimensional coordinate system.

[0078] The battery mounting structure 100 also includes a cooling element 30, a mounting element 40, and a connector 50. The cooling element 30 is located inside the battery case 10 and is connected to the battery case 10 to fix the cooling element 30 inside the battery case 10. Along the first direction Z, the side of the cooling element 30 away from the battery case 10 is used to place the battery module 20 for heat dissipation from the battery module 20. The mounting element 40 is located on the side of the battery case 10 away from the cooling element 30, and the connector 50 connects the cooling element 30 and the mounting element 40. The battery module 20 is clamped between the mounting element 40 and the cooling element 30.

[0079] Thus, in the battery fixing structure 100 of this application, the battery module 20 is placed on the cooling component 30, and the mounting component 40 is located on the side of the battery module 20 away from the cooling component 30. The mounting component 40 is fixed to the cooling component 30 through the connector 50, thereby clamping the battery module 20 between the mounting component 40 and the cooling component 30. Compared with the adhesive bonding method, this fixing method can directly fix the battery module 20, avoiding the long assembly time of the battery module 20 due to the curing of the adhesive. Moreover, the battery module 20 can be directly separated from the cooling component 30 by removing the connector 50, which facilitates the recycling of the battery module 20.

[0080] Please combine Figures 1 to 5 In one embodiment, the battery box 10 includes a base plate 11, a side plate 12, and a top plate 13. The side plate 12 is disposed around and connected to the base plate 11, and the side plate 12 and the base plate 11 together form a receiving cavity. The top plate 13 covers the top of the side plate 12 and, after being connected to the side plate 12, closes the receiving cavity. The top plate 13 can be connected to the side plate 12 using fasteners such as screws, or it can be connected to the side plate 12 by snap-fit, and the specific connection method can be selected according to the actual design requirements.

[0081] In this embodiment, the cooling component 30 is placed on the base plate 11 and connected to the base plate 11. The cooling component 30 is a water-cooled plate with a cooling cavity 31 inside. The extending direction of the cooling cavity 31 is parallel to the third direction Y, and the cooling cavity 31 allows coolant or other liquids to flow through. The water-cooled plate is made of a thermally conductive material. When the coolant flows through the cooling cavity 31, the coolant exchanges heat with the water-cooled plate, thereby carrying away the heat received by the battery module 20 from the water-cooled plate, thus achieving cooling of the battery module 20.

[0082] Specifically, along the third direction Y, the cooling chamber 31 has sealing structures 35 at both ends to seal the cooling chamber 31. The surface of the cooling component 30 away from the base plate 11 has an inlet 36 and an outlet 37, both of which are connected to the cooling chamber 31, so that the coolant can enter the cooling chamber 31 from the inlet 36 and flow out from the outlet 37.

[0083] The cooling component 30 can be fixed to the base plate 11 by adhesive bonding or by bolts or other fasteners. The fixing method between the cooling component 30 and the base plate 11 can be selected according to the actual design requirements.

[0084] It is worth noting that multiple battery modules 20 can be placed on the cooling element 30 simultaneously, so that the cooling element 30 can cool multiple battery modules 20 at the same time. Along the second direction X, multiple battery modules 20 are arranged sequentially at intervals.

[0085] In this embodiment, a reinforcing member 32 is provided inside the cooling component 30. Along the first direction Z, the opposite sides of the reinforcing member 32 are respectively connected to two inner walls of the cooling cavity 31 that are disposed opposite to each other along the first direction Z, so as to divide the cooling cavity 31 into two cooling sub-cavities 311. The extending direction of the reinforcing member 32 is parallel to the third direction Y, so that the extending direction of the formed cooling sub-cavities 311 is the same as the extending direction of the cooling cavity 31.

[0086] In addition, the reinforcement 32 can support the top surface of the cooling component 30 to ensure that the top surface of the cooling component 30 will not deform when supporting the battery module 20.

[0087] Specifically, the cooling component 30 is further provided with multiple partitions 33, spaced apart along the second direction X. The extending direction of the partitions 33 is parallel to the extending direction of the reinforcing member 32. Along the first direction Z, the opposite sides of the partitions 33 are respectively connected to two inner walls of the cooling cavity 31 that are arranged opposite each other along the first direction Z, so as to further divide the cooling cavity 31 into multiple cooling sub-cavities 311, thereby increasing the number of cooling sub-cavities 311 to divert the coolant and thus increase the flow rate of the coolant in the cooling component 30.

[0088] Along the second direction X, the width of the reinforcing member 32 is greater than the width of the partition 33, so that the cooling member 30 mainly plays a structural reinforcing role through the reinforcing member 32.

[0089] Please combine Figure 6 and Figure 7 And see Figure 2 and Figure 3 In one embodiment, the mounting member 40 is elongated, and its extension direction is parallel to the third direction Y. The mounting member 40 is located between two sets of first conductive members 22, so as to utilize the space between the two sets of first conductive members 22 to place the mounting member 40. Along the second direction X, multiple mounting portions 41 are protruding on opposite sides of the mounting member 40. Along the third direction Y, the multiple mounting portions 41 are spaced apart.

[0090] The mounting portion 41 is also elongated, and the extension direction of the mounting portion 41 is parallel to the second direction X. Each of the above-mentioned accommodating spaces 25 accommodates a mounting portion 41, so as to place the mounting portion 41 in the accommodating space 25 between two adjacent first conductive members 22.

[0091] Along the second direction X, the end of the mounting part 41 away from the mounting member 40 extends beyond the battery module 20, and the connector 50 connects the cooling member 30 and the portion of the mounting part 41 that extends beyond the battery module 20, so that the connector 50 is located in the outer area of ​​the battery module 20, and the setting of the connector 50 does not affect the battery module 20.

[0092] In this embodiment, the mounting portion 41 extends beyond the battery module 20 and has a first connecting hole 410. The cooling component 30 has a second connecting hole 34, which is located along the first direction Z and extends from the top surface of the cooling component 30 to the bottom surface of the reinforcing member 32. This allows the connector 50 to be installed after the reinforcing member 32 has the second connecting hole 34, preventing the second connecting hole 34 from affecting the sealing of the cooling sub-cavity 311. The connector 50 passes through the first connecting hole 410 and the second connecting hole 34 to connect the mounting portion 41 and the cooling component 30. The connector 50 is a screw or similar component. Both the first connecting hole 410 and the second connecting hole 34 are threaded holes, allowing the connector 50 to be threadedly connected to the mounting portion 41 and the cooling component 30, thereby improving the stability of the connection.

[0093] Specifically, along the first direction Z, the projection of the second connection hole 34 onto the battery box 10 is located within the projection of the reinforcing member 32 onto the battery box 10, ensuring that the arrangement of the second connection hole 34 does not affect the strength of the reinforcing member 32.

[0094] In this embodiment, there are multiple connectors 50, the same number as the mounting portions 41. The multiple connectors 50 are arranged in two groups along the second direction X, with the two groups of connectors 50 spaced apart on opposite sides of the battery module 20, so that each connector 50 is located on the outside of the battery module 20. When there are multiple battery modules 20, the connectors 50 are located in the space between two adjacent battery modules 20.

[0095] Each set of connectors 50 includes multiple connectors 50 spaced apart along the third direction Y, so as to improve the stability between the mounting member 40 and the cooling member 30 by means of the array-distributed connectors 50, and ensure that the battery module 20 clamped between the mounting member 40 and the cooling member 30 will not shake.

[0096] Please combine Figure 6 and Figure 7 And see Figure 2 and Figure 3In one embodiment, a limiting protrusion 214 is provided on the side of the battery module 20 away from the cooling component 30. The number of limiting protrusions 214 is the same as the number of individual battery cells 21, and each individual battery cell 21 has a limiting protrusion 214 on the top surface of its battery body 211. The limiting protrusions 214 of two adjacent individual battery cells 21 are spaced apart along the second direction X.

[0097] Along the second direction X, multiple limiting grooves 42 are provided on both opposite sides of the mounting member 40. The limiting grooves 42 extend inward along the second direction X from the surface of the mounting member 40 near the first conductive member 22. The multiple limiting grooves 42 located on the same side of the mounting member 40 are spaced apart along the third direction Y. The number of limiting grooves 42 provided on the mounting member 40 is the same as the number of limiting protrusions 214, so that each limiting groove 42 accommodates one limiting protrusion 214.

[0098] The limiting groove 42 is rectangular in shape, and the limiting protrusion 214 has the same shape as the limiting groove 42. Along the second direction X, the inner wall of the limiting groove 42 on the side away from the first conductive member 22 abuts against the limiting protrusion 214, and along the third direction Y, the inner walls on opposite sides of the limiting groove 42 abut against the limiting protrusion 214, so that the mounting member 40 limits the battery module 20 in the second direction X and the third direction Y, and cooperates with the battery module 20 to clamp between the mounting member 40 and the cooling member 30 to limit the battery module 20 in the first direction Z, thereby realizing the limitation of the battery module 20 in the first direction Z, the second direction X, and the third direction Y, and preventing the battery module 20 from shaking.

[0099] Furthermore, a groove 2140 is formed on the side of the limiting protrusion 214 near the first conductive member 22, and the groove 2140 extends along the second direction X. An extension protrusion 220 is formed on the side of the first conductive member 22 near the mounting member 40, and the end of the extension protrusion 220 away from the first conductive member 22 extends into the groove 2140. The extension protrusion 220 is made of a metal material such as aluminum, and the extension protrusion 220 is electrically connected to the first conductive member 22. Along the first direction Z, the top surface of the extension protrusion 220 is flush with the top surface of the mounting member 40.

[0100] As mentioned above, the second conductive element 23 is located between the two sets of first conductive elements 22, so that the extension protrusions 220 of each of the two sets of first conductive elements 22 extend into the area between the two sets of first conductive elements 22 and are electrically connected to the second conductive element 23. The second conductive element 23 has the same shape as the mounting member 40 and is laid on the top surface of the mounting member 40. The mounting member 40 can be fixed to the mounting member 40 by adhesive bonding. When the mounting member 40 is fixed to the cooling member 30, the bottom surface of the second conductive element 23 abuts against each extension protrusion 220 to form a current channel. Thus, after the battery module 20 is installed, the second conductive element 23 can be directly electrically connected to each of the first conductive elements 22.

[0101] The specific embodiments of this application have been described above with reference to the accompanying drawings. However, those skilled in the art will understand that various changes and substitutions can be made to the specific embodiments of this application without departing from the scope of this application. All such changes and substitutions fall within the scope defined by this application.

Claims

1. A battery fixing structure for fixing a battery module; characterized in that, The battery fixing structure includes: A battery case for housing the battery module; A cooling component located inside the battery compartment and connected to the battery compartment, wherein the side of the cooling component away from the battery compartment along a first direction is used to place the battery module; The mounting component is located on the side of the battery box away from the cooling component; A connector that connects the cooling component and the mounting component, wherein the battery module is clamped between the mounting component and the cooling component.

2. The battery fixing structure as described in claim 1, characterized in that, Along the second direction, mounting portions are protruding on both opposite sides of the mounting member, and the second direction intersects with the first direction; Along the second direction, the end of the mounting portion away from the mounting member extends beyond the battery module, and the connector connects the cooling member and the portion of the mounting portion that extends beyond the battery module.

3. The battery fixing structure as described in claim 2, characterized in that, The mounting portion extending beyond the battery module has a first connecting hole, and the cooling component has a second connecting hole. The connector passes through the first connecting hole and the second connecting hole to connect the mounting portion and the cooling component.

4. The battery fixing structure as described in claim 3, characterized in that, The cooling component has a cooling cavity inside, and a reinforcing member is provided inside the cooling component. The reinforcing member connects two inner walls of the cooling cavity that are arranged opposite each other along the first direction, and is used to divide the cooling cavity into at least two cooling sub-cavities. Along the first direction, the projection of the second connecting hole onto the battery box is located within the projection of the reinforcing member onto the battery box.

5. The battery fixing structure as described in claim 1, characterized in that, The connectors are configured in two sets along the second direction, with the two sets of connectors spaced apart on opposite sides of the battery module, and the second direction intersecting the first direction; Each set of connectors includes a plurality of connectors spaced apart along a third direction, which intersects the first direction and the second direction.

6. The battery fixing structure as described in claim 1, characterized in that, The battery module has a limiting protrusion on the side away from the cooling component, and the mounting component has a limiting groove, in which the limiting protrusion is received.

7. The battery fixing structure as described in claim 6, characterized in that, Along the second direction, the limiting grooves are provided on both opposite sides of the mounting component, and the second direction intersects with the first direction; Each of the limiting grooves contains a limiting protrusion, and the groove wall of the limiting groove abuts against the limiting protrusion to limit the battery module at least in the second direction and the third direction, the third direction intersecting the second direction and the first direction.

8. A battery pack, characterized in that, It includes a battery module and a battery fixing structure as described in any one of claims 1 to 7, wherein the battery module is fixed to the battery box by the battery fixing structure.

9. The battery pack as described in claim 8, characterized in that, The battery module includes: Multiple individual battery cells are arranged sequentially along a third direction; A plurality of first conductive elements are provided corresponding to a plurality of said individual cells, and each first conductive element is electrically connected to the anode structure of one said individual cell and the cathode structure of another adjacent said individual cell.

10. The battery pack as claimed in claim 9, characterized in that, The battery pack also includes a second conductive element, which is electrically connected to a plurality of the first conductive elements.

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