Battery fixing structure, battery pack, power utilization device and vehicle

Abstract

The utility model discloses a battery fixing structure, a battery pack, a power utilization device and a vehicle, the battery fixing structure comprises a metal shell, the metal shell is provided with a battery accommodating space, and the first bottom wall of the metal shell is provided with an insulating support column; the insulating part is provided with a second bottom wall and a vertical wall connected with the second bottom wall, and the second bottom wall is provided with a through hole; the insulating part is located in the battery containing space, the insulating supporting column penetrates through the through hole, and the top end of the insulating supporting column is located between the two vertical walls of the insulating part. The insulation performance of the battery fixing structure can be improved, and the battery fixing structure is particularly suitable for a high-voltage system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, and more particularly to a battery fixing structure, a battery pack, an electric device and a vehicle. BACKGROUND

[0002] In order to improve the protection performance of the internal battery module, the battery fixing structure usually adopts a metal shell, and the battery module is fixed in the metal shell through a connecting piece. This structure has poor insulation performance and is only suitable for low-voltage systems. For high-voltage systems, the insulation performance is insufficient. CONTENT OF THE UTILITY MODEL

[0003] An object of the present application is to provide a new technical solution of a battery fixing structure, a battery, an electric device and a vehicle, so as to reduce the adverse effects of the battery module thermal runaway on the battery wiring harness.

[0004] To achieve the above-mentioned object, on the one hand, the embodiments of the present application provide a battery fixing structure, comprising:

[0005] a metal shell, the metal shell having a battery accommodating space, a first bottom wall of the metal shell being provided with an insulating support column;

[0006] an insulating piece, the insulating piece having a second bottom wall and a vertical wall connected with the second bottom wall, the second bottom wall being provided with a through hole;

[0007] the insulating piece being located in the battery accommodating space, the insulating support column passing through the through hole, and a top end of the insulating support column being located between the two vertical walls of the insulating piece.

[0008] Optionally, the battery fixing structure further comprises a metal cover connected with the metal shell to close the battery accommodating space, and a first gap being present between the metal cover and the top end of the vertical wall.

[0009] Optionally, a second gap is present between the vertical wall and the side wall of the metal shell, and the side wall is provided with a flow channel communicating with the second gap.

[0010] Optionally, a first groove is formed on a side of the vertical wall facing the side wall, and the first groove is oppositely arranged with the flow channel.

[0011] Optionally, a second groove is formed on a side of the vertical wall opposite to the side wall.

[0012] Optionally, the vertical wall comprises a first vertical wall and a second vertical wall, and a third gap is present between the first vertical wall and the second vertical wall, and the third gap communicates with the second gap.

[0013] Optionally, the side wall comprises a first side wall and a second side wall opposite to each other, the flow channel comprises an inlet flow channel arranged on the first side wall and an outlet flow channel arranged on the second side wall, and the inlet flow channel and the outlet flow channel are respectively provided with a valve.

[0014] In another aspect, embodiments of the present application provide a battery pack comprising:

[0015] The battery fixing structure as described above;

[0016] The battery module;

[0017] The battery module is located between a pair of the vertical walls, and the top end of the insulating support column abuts against the battery module.

[0018] Optionally, the battery module comprises a first module and a second module, and a fourth gap exists between the first module and the second module, and the third gap of the vertical wall is arranged opposite to the fourth gap.

[0019] Optionally, the battery module has a wiring terminal, and the wiring terminal is located in the second groove of the vertical wall.

[0020] In another aspect, embodiments of the present application provide an electric device comprising the battery fixing structure as described above, or comprising the battery pack as described above.

[0021] In another aspect, embodiments of the present application provide a vehicle comprising the battery fixing structure as described above, or comprising the battery pack as described above, or comprising the electric device as described above.

[0022] The beneficial effects of embodiments of the present application are that the vertical wall can be used to clamp the battery module, and the insulating support column can be used to support the battery module, so as to realize the insulation between the battery module and the metal shell, and the structure is simple, and is particularly suitable for high-voltage systems.

[0023] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings incorporated in and forming a part of the specification illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application.

[0025] Figure 1 is a perspective view of a metal shell of an embodiment of the present application.

[0026] Figure 2 is a top view of a metal shell of an embodiment of the present application.

[0027] Figure 3is an exploded view of a battery pack of an embodiment of the present application, wherein a metal cover is omitted.

[0028] Figure 4 is an exploded view of a battery pack of an embodiment of the present application.

[0029] Figure 5 is an exploded view of a battery pack of an embodiment of the present application, wherein a metal cover is omitted.

[0030] Figure 6 is an exploded view of a battery pack of an embodiment of the present application, wherein a metal cover is omitted.

[0031] BRIEF DESCRIPTION OF DRAWINGS

[0032] 1, metal housing; 101, battery accommodation space; 102, insulation support column; 103, first bottom wall; 104, first side wall; 105, second side wall; 106, third side wall; 107, fourth side wall; 108, liquid inlet flow channel; 109, liquid outlet flow channel; 2, insulation member; 201, through hole; 202, second bottom wall; 203, vertical wall; 204, first vertical wall; 205, second vertical wall; 206, second gap; 207, first groove; 208, second groove; 209, third gap; 3, battery module; 301, terminal; 302, first module; 303, second module; 304, fourth gap; 4, metal cover. DETAILED DESCRIPTION

[0033] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements, numerical expressions, and numerical values of components and steps set forth in these embodiments are not limiting to the scope of the present application unless otherwise specifically stated.

[0034] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application or its application or uses.

[0035] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as part of the specification, where appropriate.

[0036] In all of the examples shown and discussed herein, any specific values should be interpreted as merely exemplary, and not as a limitation. Thus, other examples of exemplary embodiments can have different values.

[0037] It should be noted that like numbers and letters refer to like items throughout the drawings, and that, once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0038] AsFigures 1 to 6 As shown, an embodiment of the present application provides a battery fixing structure, including: a metal shell 1 and an insulating member 2.

[0039] like Figure 1 and Figure 2 As shown, the metal shell 1 has a battery accommodating space 101 , and the bottom wall of the metal shell 1 is provided with an insulating support column 102 . For the sake of clarity, the bottom wall of the metal shell 1 is marked as a first bottom wall 103 .

[0040] More specifically, the metal housing 1 includes a first bottom wall 103 and a first side wall 104, a second side wall 105, a third side wall 106, and a fourth side wall 107 connected to the first bottom wall 103. The first side wall 104 and the second side wall 105 form a pair of opposing side walls, and the third side wall 106 and the fourth side wall 107 form a pair of opposing side walls. The first bottom wall 103, the first side wall 104, the second side wall 105, the third side wall 106, and the fourth side wall 107 collectively form a battery accommodating space 101. The insulating support column 102 is attached to the first bottom wall 103 by welding, riveting, or other processes and is located within the battery accommodating space 101.

[0041] like Figure 3 As shown, the insulating member 2 has a bottom wall and a vertical wall 203 connected to the bottom wall, and the bottom wall is provided with a through hole 201. For the sake of clarity, the bottom wall of the insulating member 2 is marked as a second bottom wall 202.

[0042] More specifically, both vertical walls 203 are connected to the second bottom wall 202, and the two vertical walls 203 are spaced apart, with the space between them being used to accommodate the battery module 3. The vertical wall 203 can be a single, integral wall or, as described below, a split vertical wall (including a first vertical wall 204 and a second vertical wall 205). In the split vertical wall embodiment, although only the second vertical wall 205 is directly connected to the second bottom wall 202, the first and second vertical walls 204, 205 can be considered as a single unit, still being connected to the second bottom wall 202.

[0043] like Figure 5 As shown, the insulating member 2 is located in the battery accommodating space 101 , the insulating support column 102 passes through the through hole 201 , and the top end of the insulating support column 102 is located between a pair of vertical walls 203 of the insulating member 2 .

[0044] Specifically, the height of the insulating support column 102 is greater than the thickness of the second bottom wall 202, so that after the insulating support column 102 is inserted into the through hole 201, the insulating support column 102 will pass through the through hole 201, so that the top end of the insulating support column 102 reaches the spacing space between the pair of standing walls 203 of the insulating member 2. Therefore, after the battery module 3 is installed between the pair of standing walls 203, the two standing walls 203 will clamp the battery module 3, and the top end of the insulating support column 102 will support the lower part of the battery module 3, thereby achieving the insulation between the battery module 3 and the metal shell 1, protecting the battery module 3 by using the strength of the metal shell 1, and the second bottom wall 202 can occupy a certain battery accommodating space 101 while providing insulation performance, thereby reducing the amount of cooling oil in the liquid cooling system and reducing the cost.

[0045] As shown in Figure 4 , in the present embodiment, the battery fixing structure further comprises a metal cover 4. The metal cover 4 is connected with the metal shell 1 to close the battery accommodating space 101. There is a first gap between the metal cover 4 and the top end of the standing wall 203.

[0046] Specifically, the metal cover 4 can be connected with the metal shell 1 by bolts, rivets or the like connecting members, and a sealing strip can be arranged between the metal cover 4 and the metal shell 1 to increase the sealing performance. There is a first gap (not shown in Figure 4 ) between the metal cover 4 and the top end of the standing wall 203, which can not only insulate the battery module 3 from the metal cover 4, but also serve as a flow channel for the cooling liquid.

[0047] As shown in Figure 1 , Figure 2 , Figure 5 and Figure 6 , there is a second gap 206 between the standing wall 203 and the side wall of the metal shell 1, and the side wall is provided with a flow channel communicating with the second gap 206.

[0048] Specifically, a second gap 206 exists between one of the upright walls 203 and the first side wall 104, and a second gap 206 exists between the other of the upright walls 203 and the second side wall 105, that is, the upright walls 203 do not completely fit the side walls of the metal shell 1. The first side wall 104 and the second side wall 105 are both provided with flow channels, for the sake of clarity, the flow channel provided by the first side wall 104 is marked as the liquid inlet flow channel 108, and the flow channel provided by the second side wall 105 is marked as the liquid outlet flow channel 109. The second gap 206 between the upright wall 203 and the first side wall 104 is communicated with the liquid inlet flow channel 108, and the second gap 206 between the upright wall 203 and the second side wall 105 is communicated with the liquid outlet flow channel 109, so that the cooling liquid in the liquid inlet flow channel 108 can flow into the battery accommodation space 101 through the second gap 206 to cool the battery module 3 therein, and then flow out through the liquid outlet flow channel 109. At this time, the insulating member 2 not only plays an insulating role, but also plays a role of forming a cooling liquid flow channel, and the structure is simple.

[0049] As shown in Figures 3 to 6 , the side of the upright wall 203 facing the side wall is provided with a first groove 207, and the first groove 207 is arranged opposite to the flow channel.

[0050] Specifically, the side of one of the upright walls 203 facing the first side wall 104 is provided with a first groove 207, and the first groove 207 is arranged opposite to the liquid inlet flow channel 108. The side of the other of the upright walls 203 facing the second side wall 105 is provided with a first groove 207, and the first groove 207 is arranged opposite to the liquid outlet flow channel 109. The first groove 207 functions to buffer the cooling liquid of the liquid inlet flow channel 108 or the liquid outlet flow channel 109. Taking the liquid inlet flow channel 108 as an example, when the cooling liquid in the liquid inlet flow channel 108 enters the second gap 206, due to the small caliber and high flow rate of the liquid inlet flow channel 108, local turbulence is easily generated, and after the first groove 207 is arranged, the cooling liquid flowing out of the liquid inlet flow channel 108 will be buffered in the first groove 207, thereby facilitating the cooling liquid to flow more stably into the battery accommodation space 101 through the second gap 206 to uniformly cool the battery module 3.

[0051] As shown in Figure 3 , Figure 5 and Figure 6 , the side of the upright wall 203 opposite to the side wall is provided with a second groove 208.

[0052] Specifically, the side of one of the upright walls 203 opposite to the first side wall 104 is provided with a second groove 208, and the side of the other of the upright walls 203 opposite to the second side wall 105 is also provided with a second groove 208. The second groove 208 is used to accommodate the wiring terminal 301 of the battery module 3, thereby determining the position of the battery module 3 between the third side wall 106 and the fourth side wall 107.

[0053] As shown in Figure 3 and Figure 5 The stand wall 203 includes a first stand wall 204 and a second stand wall 205. There is a third gap 209 between the first stand wall 204 and the second stand wall 205. The third gap 209 communicates with the second gap 206.

[0054] Specifically, each stand wall 203 includes two parts, a first stand wall 204 and a second stand wall 205. The second stand wall 205 is connected to the second bottom wall 202, and the first stand wall 204 can be pre-bonded on the battery module 3 during assembly. After assembly is completed, the third gap 209 is formed between the first stand wall 204 and the second stand wall 205. Alternatively, the third gap 209 can be machined on the stand wall 203, and the stand wall 203 is divided into the first stand wall 204 and the second stand wall 205 by the third gap 209. The first stand wall 204 and the second stand wall 205 still remain in a connected state. The third gap 209 communicates with the second gap 206, so that a part of the cooling liquid can flow in or out through the third gap 209 to cool the middle part of the battery module 3, thereby obtaining a better cooling effect.

[0055] As shown in Figure 1 and Figure 2 The side wall of the metal shell 1 includes opposite first and second side walls 104 and 105. The flow channel includes an inlet flow channel 108 provided on the first side wall 104 and an outlet flow channel 109 provided on the second side wall 105. The inlet flow channel 108 and the outlet flow channel 109 are respectively provided with valves.

[0056] Specifically, the number of inlet flow channels 108 can be one or more, and the number of outlet flow channels 109 can be one or more. The inlet flow channel 108 and the outlet flow channel 109 are respectively provided with valves for adjusting the flow rate of the cooling liquid flowing into or out of the battery containing space 101, thereby adjusting the cooling speed of the battery module 3.

[0057] As shown in Figures 3 to 6 The embodiment of the application provides a battery pack, which includes the battery fixing structure and the battery module 3 as described above. The battery module 3 is located between a pair of stand walls 203, and the top end of the insulating support column 102 abuts against the battery module 3.

[0058] Specifically, after the insulation member 2 is placed in the battery accommodating space 101, the insulation support column 102 passes through the through hole 201 and abuts against the battery module 3, thereby supporting the battery module 3. A pair of standing walls 203 clamps the battery module 3. In this way, the insulation of the battery module 3 from the metal shell 1 can be achieved. In more detail, the battery module 3 is insulated from the first bottom wall 103 of the metal shell 1 by the support of the insulation support column 102 and the partition of the second bottom wall 202. The battery module 3 is insulated from the first side wall 104 and the second side wall 105 by the partition of the standing wall 203. The battery module 3 is spaced apart from the third side wall 106 and the fourth side wall 107 by the clamping positioning of the standing wall 203, thereby being gas insulated. The battery module 3 is insulated from the metal cover 4 by the first gap.

[0059] As shown in Figures 3 to 5 , the battery module 3 includes a first module 302 and a second module 303, and a fourth gap 304 is present between the first module 302 and the second module 303. The third gap 209 of the standing wall 203 is arranged opposite to the fourth gap 304.

[0060] Specifically, the battery module 3 can be divided into two layers, and each layer is formed by a plurality of blade batteries connected in series and parallel, respectively, to form the first module 302 and the second module 303. The first module 302 and the second module 303 can be connected in series or in parallel. The fourth gap 304 between the first module 302 and the second module 303 is arranged opposite to the third gap 209, so that the cooling liquid can directly flow into the fourth gap 304 through the third gap 209 to cool between the first module 302 and the second module 303, thereby improving the cooling speed.

[0061] As shown in Figures 3 to 6 , the battery module 3 has a wiring terminal 301 located in the second groove 208 of the standing wall 203.

[0062] Next, how the battery module 3 in the battery pack is positioned and insulated from the metal shell 1 will be described in detail:

[0063] After the insulation piece 2 is placed in the battery accommodating space 101, the insulation support column 102 passes through the through hole 201, thereby positioning the insulation piece 2. The top end of the insulation support column 102 abuts against the battery module 3, thereby supporting the battery module 3 and achieving positioning between the second bottom wall 202 and the metal cover 4. The battery module 3 is insulated from the first bottom wall 103 of the metal shell 1 by the support of the insulation support column 102 and the separation of the second bottom wall 202. After the metal cover 4 is connected with the metal shell, the metal cover 4 and the battery module 3 are gas-insulated through the first gap. After the terminal 301 of the battery module 3 is located in the second groove 208, the relative position between the battery module 3 and the first side wall 104, the second side wall 105, the third side wall 106 and the fourth side wall 107 is determined. The battery module 3 is insulated from the first side wall 104 and the second side wall 105 by the separation of the vertical wall 203. The battery module 3 is spaced apart from the third side wall 106 and the fourth side wall 107 by the clamping positioning of the vertical wall 203, thereby being gas-insulated. The battery module 3 is insulated from the metal cover 4 by the first gap (an internal insulating structure that can be filled).

[0064] Next, it will be specifically described how the battery module 3 in the battery pack is cooled by the cooling liquid:

[0065] The cooling liquid (for example, insulating oil) enters the second gap through the liquid inlet flow channel 108 and is buffered at the first groove 207. Then, part of the cooling liquid flows between the second bottom wall 202 and the battery module 3, part of the cooling liquid flows between the first module 302 and the second module 303 through the third gap 209 and the fourth gap 304, and part of the cooling liquid flows into the first gap between the metal cover 4 and the battery module 3. Therefore, the cooling liquid infiltrates the battery module 3 from the upper, middle and lower three paths, the cooling is more uniform, and the cooling speed is fast. After the cooling liquid infiltrates the battery module 3 and completes the cooling, it flows out of the battery accommodating space 101 through the liquid outlet flow channel 109. During the cooling process, by adjusting the valve at the liquid inlet flow channel 108 or the liquid outlet flow channel 109, the flow rate of the cooling liquid can be adjusted, thereby adjusting the cooling speed.

[0066] Therefore, the battery pack in the embodiment has the advantages of good insulation performance, uniform cooling, high cooling efficiency, simple structure and the like, and is particularly suitable for high-voltage systems and is suitable for battery liquid cooling systems.

[0067] The embodiment of the present application also provides a power consumption device, which comprises the battery fixing structure as described above or comprises the battery pack as described above. The power consumption device can be a motor, an electric vehicle, a server, a lighting device or the like. The power consumption device thus has the advantages of good insulation performance, uniform cooling, high cooling efficiency, simple structure and the like, and is particularly beneficial for the use of high-voltage power consumption devices.

[0068] In another aspect, embodiments of the present application provide a vehicle comprising the battery fixing structure as described above, or comprising the battery pack as described above, or comprising the power consuming device as described above. The vehicle thus has the advantages of good insulation performance, uniform cooling, high cooling efficiency, simple structure, etc. The vehicle can be a pure electric vehicle, or a hybrid vehicle, or a fuel vehicle equipped with a power consuming device such as an air conditioner.

[0069] In the above embodiments, the focus is on the differences between the various embodiments, and the different optimization features between the various embodiments can be combined to form a better embodiment as long as they are not contradictory. For the sake of brevity, these will not be described here.

[0070] Although some specific embodiments of the present application have been described in detail by examples, those skilled in the art should understand that the above examples are only for illustration and are not intended to limit the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A battery fixing structure, characterized in that: include: A metal shell having a battery accommodating space, wherein a first bottom wall of the metal shell is provided with an insulating support column; an insulating member, the insulating member comprising a second bottom wall and a vertical wall connected to the second bottom wall, wherein the second bottom wall is provided with a through hole; The insulating member is located in the battery accommodating space, the insulating support column passes through the through hole, and the top end of the insulating support column is located between the two vertical walls of the insulating member.

2. The battery fixing structure according to claim 1, characterized in that: It also includes a metal cover, which is connected to the metal shell to close the battery accommodating space, and a first gap is present between the metal cover and the top end of the vertical wall.

3. The battery fixing structure according to claim 1, characterized in that: A second gap is provided between the vertical wall and the side wall of the metal shell, and the side wall is provided with a flow channel communicating with the second gap.

4. The battery fixing structure according to claim 3, characterized in that: A first groove is formed on one side of the vertical wall facing the side wall, and the first groove is arranged opposite to the flow channel.

5. The battery fixing structure according to claim 3, characterized in that: A second groove is formed on a side of the vertical wall opposite to the side wall.

6. The battery fixing structure according to claim 3, characterized in that: The vertical wall includes a first vertical wall and a second vertical wall. There is a third gap between the first vertical wall and the second vertical wall, and the third gap is connected to the second gap.

7. The battery fixing structure according to claim 3, characterized in that: The side wall includes a first side wall and a second side wall that are opposite to each other. The flow channel includes a liquid inlet channel arranged on the first side wall and a liquid outlet channel arranged on the second side wall. The liquid inlet channel and the liquid outlet channel are respectively provided with valves.

8. A battery pack, characterized in that: include: The battery fixing structure according to any one of claims 1 to 7; Battery modules; The battery module is located between the pair of vertical walls, and the top end of the insulating support column abuts against the battery module.

9. The battery pack according to claim 8, characterized in that: The battery module includes a first module and a second module. A fourth gap exists between the first module and the second module. The third gap of the vertical wall is arranged opposite to the fourth gap.

10. The battery pack according to claim 8, wherein: The battery module has a connection terminal, and the connection terminal is located in the second groove of the vertical wall.

11. An electrical device, characterized in that: The battery fixing structure comprises the battery fixing structure according to any one of claims 1 to 7, or the battery pack according to any one of claims 8 to 10.

12. A vehicle, characterized in that: It comprises the battery fixing structure according to any one of claims 1 to 7, or the battery pack according to any one of claims 8 to 10, or the electrical device according to claim 11.

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