Space ring, battery monomer and vehicle

Abstract

The utility model provides a space ring, a battery cell and a vehicle. The space ring comprises a space ring body and a traction piece; the space ring body comprises a first side wall, a second side wall and a base, the base is connected with the first side wall and the second side wall, and a pressure relief groove is defined by the first side wall, the second side wall and the base; the traction piece is formed in the pressure relief groove and fixedly connected with the space ring body, and traction force can be applied to the traction piece so as to drive the space ring to move.

Description

Technical Field

[0001] The present application relates to the technical field of battery assembly, and in particular to a spacer, a battery cell and a vehicle. Background Art

[0002] In the existing solution, when assembling the battery cell into the shell, the negative electrode cover is generally pushed into the shell by a push rod. The contact position between the battery cell and the negative electrode cover is subjected to great force, which can easily cause damage to the battery cell. Utility Model Content

[0003] The present application provides a spacer, a battery cell and a vehicle, which can at least partially solve the above-mentioned problems.

[0004] In the first aspect, the present application provides a spacer, including a spacer body and a traction member; the spacer body includes a first side wall, a second side wall and a base, the base is respectively connected to the first side wall and the second side wall, the first side wall, the second side wall and the base form a pressure relief groove; the traction member is formed in the pressure relief groove and is fixedly connected to the spacer body, and the traction member can be applied with traction force to drive the spacer to move.

[0005] Optionally, the traction member includes a traction rib and a reinforcement member connected to each other, and the reinforcement member fixedly connects the first side wall and the second side wall.

[0006] Optionally, the traction bar is fixedly connected to the reinforcement member.

[0007] Optionally, the traction rib is protrudingly provided on the first reinforcement member.

[0008] Optionally, the traction rib includes a first traction portion and a second traction portion that are coaxially arranged, and the first traction portion and the second traction portion are respectively protruded from two sides of the first reinforcement.

[0009] Optionally, the first side wall and the second side wall are spaced apart along a first direction, and the traction ribs also extend along the first direction.

[0010] Optionally, the traction ribs fixedly connect the first side wall and the second side wall.

[0011] Optionally, the spacer body further includes at least one second reinforcement member formed in the pressure relief groove, the second reinforcement member is fixedly connected to the first side wall and the second side wall, and the second reinforcement member is spaced apart from the first reinforcement member.

[0012] In a second aspect, the present application provides a battery cell, comprising:

[0013] A spacer as described in any of the above items; and

[0014] A battery cell, wherein a pole ear is led out from one end of the battery cell, and at least a part of the structure of the pole ear is accommodated in the spacer.

[0015] In a third aspect, the present application provides a vehicle, comprising the spacer described in any one of the above items.

[0016] The present application provides a spacer, which can be assembled on the battery cell of a single battery. When assembling the battery cell into a shell, an operator can connect a traction device with a traction piece of the spacer, and apply traction force to the traction piece through the traction device to drive the spacer to move, thereby driving the battery cell to move, and pulling the battery cell into the shell. Compared with the solution of pushing the negative electrode cover plate into the shell by a push rod, the risk of damage to the battery cell caused by excessive thrust can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of an existing battery cell before assembly;

[0018] Figure 2 It is a schematic diagram of the existing battery cell assembly;

[0019] Figure 3 It is a schematic diagram of the existing battery cell after assembly;

[0020] Figure 4 It is a schematic diagram of the battery cell before assembly of the present application;

[0021] Figure 5 It is a schematic diagram of the battery cell assembly of the present application;

[0022] Figure 6 It is a schematic diagram of the battery cell after assembly of the present application;

[0023] Figure 7 is a schematic diagram of a battery cell before assembly shown in another embodiment;

[0024] Figure 8 is a schematic diagram of a battery cell assembly shown in another embodiment;

[0025] Fig. 9 is a schematic diagram of a battery cell after assembly shown in another embodiment;

[0026] Fig.10 is a schematic structural diagram of a battery unit shown in an embodiment of the present application;

[0027] Fig.11 is a schematic structural diagram of a spacer ring shown in an embodiment;

[0028] Fig.12 is a schematic diagram of the structure of the spacer shown from another perspective;

[0029] Fig.13 is a schematic diagram of the structure of the spacer shown from another viewing angle;

[0030] Fig.14 yes Fig.13 A schematic diagram of a partial cross-sectional structure;

[0031] Fig.15 It is a schematic diagram of the exploded structure of a battery cell unit shown in an embodiment.

[0032] Explanation of the reference numerals: 10, spacer; 11, spacer body; 111, first side wall; 112, second side wall; 113, bottom wall; 114, gap; 115, accommodating groove; 116, mounting groove; 117, mounting hole; 12, base; 121, pressure relief groove; 122, pressure relief hole; 123, hollow area; 124, glue injection hole; 13, second reinforcement; 15, first opening; 16, traction member; 161, traction rib; 1611, first traction part; 1612, second traction part; 162, first reinforcement; 20, traction equipment; 30, battery cell; 31, positive ear; 32, negative ear; 33, positive top patch; 34, negative top patch; 35, positive cover plate; 36, negative cover plate; 37, insulating film; 40, shell; 50, push rod. DETAILED DESCRIPTION

[0033] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application.

[0034] The terms used in this application are only for the purpose of describing specific embodiments, and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate quantity restrictions, but indicate that there is at least one, and will be separately described if only "one" is referred to. "Multiple" or "several" means two or more. Unless otherwise specified, similar words such as "front", "rear", "lower" and / or "upper", "top", "bottom" are only for the convenience of explanation, and are not limited to one position or one spatial orientation. Similar words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. The words "connected" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0035] refer to Figures 1 to 3 As shown, the existing single battery includes a battery cell 30, an aluminum shell 40, and a negative electrode cover 36 installed on the negative electrode of the battery cell 30. When assembling the battery cell 30 into the aluminum shell 40, the operator generally uses a push rod 50 to push the negative electrode cover 36 to indirectly push the battery cell 30, so as to assemble the battery cell 30 into the aluminum shell 40. However, in the process of assembling the battery cell 30 into the aluminum shell 40, only the push rod 50 pushes the negative electrode cover 36, and the position where the battery cell 30 contacts the negative electrode cover 36 is subjected to a large force, which can easily cause damage to the battery cell 30.

[0036] In view of this, the present application provides a spacer, a battery cell and a vehicle. The spacer, the battery cell and the vehicle are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can be combined with each other.

[0037] In view of this, the present application provides a spacer 10, a battery cell and a vehicle. The spacer 10, the battery cell and the vehicle are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can be combined with each other.

[0038] refer to Figures 4 to 15As shown, an embodiment of the present application provides a spacer 10, which can be applied to the battery cell 30 of the battery cell. The spacer 10 includes a spacer body 11 and a traction member 16. The spacer body 11 includes a first side wall 111, a second side wall 112 and a base 12. The base 12 is respectively connected to the first side wall 111 and the second side wall 112. The first side wall 111, the second side wall 112 and the base 12 are surrounded by a pressure relief groove 121; the traction member 16 is formed in the pressure relief groove 121 and is fixedly connected to the spacer body 11. The traction member 16 can be applied with traction to drive the spacer 10 to move.

[0039] In this way, when assembling the battery cell 30 into the housing 40, the operator can connect the traction member 16 of the spacer 10 through the traction device 20, and pull the battery cell 30 into the housing 40 through the traction device 20. Compared with the solution of pushing the negative electrode cover plate 36 by the push rod 50 to push the battery cell 30 into the housing 40, the risk of damage to the battery cell 30 caused by excessive thrust can be reduced. In addition, the traction member 16 is formed in the pressure relief groove 121, which can also enhance the structural strength of the pressure relief groove 121 and improve the ability of the pressure relief groove 121 to resist deformation.

[0040] The specific assembly process of battery cell 30 can be referred to Figure 4 , Figure 5 and Figure 6 , the operator only needs to pull the traction member 16 of the spacer 10 through the traction device 20 to assemble the battery cell 30 into the housing 40. In another embodiment, please refer to Figure 7 , Figure 8 and Fig. 9 , the operator can use the push rod 50 to push the negative electrode cover 36 of the single battery while pulling the traction member 16 of the spacer 10 through the traction device 20, so as to assemble the battery cell 30 into the housing 40. It can be understood that the above are only two assembly methods given in this embodiment. In fact, the present application is not limited to the above assembly methods.

[0041] refer to Fig.11 , Fig.12 , Fig.13 , Fig.14 and Fig.15As shown. In one embodiment, the traction member 16 includes a traction rib 161 and a first reinforcement member 162 connected to each other, and the first reinforcement member 162 is fixedly connected to the first side wall 111 and the second side wall 112. The traction rib 161 is connected to the first reinforcement member 162. When the traction mechanism pulls the traction rib 161, the first reinforcement member 162 can provide a certain support force to the traction rib 161 to prevent the traction rib 161 from being broken. In addition, the traction rib 161 has a simple structure and is easy to process, and can be easily applied in the industry. In addition, in this embodiment, the first reinforcement member 162 is also connected to the first side wall 111 and the second side wall 112, which can greatly improve the structural strength of the spacer body 11 and the pressure relief groove 121. Of course, in another embodiment (not shown), the first reinforcement member 162 can be fixedly connected to only one of the first side wall 111 and the second side wall 112, and the first reinforcement member 162 can also be fixedly connected to the base 12. In another embodiment (not shown), the traction member 16 may only include the traction ribs 161, and the traction ribs 161 may be fixedly connected to the first side wall 111 and / or the second side wall 112, or may be fixedly connected to the base 12. In another embodiment (not shown), the spacer body 11 may also include an upper wall and a lower wall, and the upper wall, the lower wall, the first side wall 111, and the second side wall 112 form a frame, and the traction ribs 161 may be fixedly connected to the upper wall or the lower wall.

[0042] The first reinforcement member 162 has various structures and shapes, and can be block-shaped, plate-shaped, spherical, linear, etc. The traction ribs 161 can be strip-shaped, square-shaped, spherical, etc., but are not limited thereto.

[0043] like Fig.11 In the embodiment shown, the first reinforcement member 162 is a flat plate structure, and the first reinforcement ribs are respectively along Fig.11 The Z direction and the Y direction shown extend perpendicularly to the first side wall 111 and the second side wall 112 .

[0044] In one embodiment, the traction bar 161 is fixedly connected to the first reinforcement member 162. In other words, the traction bar 161 can extend upward from the first reinforcement member 162 to facilitate connection with the traction device 20.

[0045] In a further embodiment, the traction bar 161 is protruded from the first reinforcement member 162. In this way, while ensuring that the traction bar 161 can be connected to the traction device 20, the space in the pressure relief groove 121 is occupied as little as possible, which facilitates the overall layout design of the spacer 10.

[0046] In one embodiment, the traction rib 161 includes a first traction portion 1611 and a second traction portion 1612 that are coaxially arranged, and the first traction portion 1611 and the second traction portion 1612 are respectively protruded on both sides of the first reinforcement member 162. Fig.13 As shown, the first traction portion 1611 is protruded above the first reinforcement member 162 , and the second traction portion 1612 is protruded below the first reinforcement member 162 .

[0047] In this way, the traction mechanism can be simultaneously engaged with the first traction part 1611 and the second traction part 1612 of the traction bar 161. On the premise of ensuring the rigidity of the traction bar 161, the traction area between the traction bar 161 and the traction mechanism is increased, making the traction mechanism more stable during the process of pulling the spacer 10.

[0048] In one embodiment, the first traction part 1611 and the second traction part 1612 are symmetrically arranged on the plane where the first reinforcement member 162 is located. The above arrangement can make the first traction part 1611 and the second traction part 1612 receive substantially equal forces, so that the spacer 10 receives a more uniform force during the pulling process, avoiding movement deviation.

[0049] In one embodiment, the first side wall 111 and the second side wall 112 are arranged along a first direction ( Fig.11 The traction ribs 161 are arranged at intervals in the Y direction as shown, and the traction ribs 161 also extend along the first direction. It is easy to understand that this can also increase the traction area of ​​the traction ribs 161 and the traction mechanism, making the traction mechanism more stable during the process of pulling the spacer 10.

[0050] Furthermore, the traction rib 161 is also fixedly connected to the first side wall 111 and the second side wall 112 to further enhance the structural strength of the spacer body 11 and the pressure relief groove 121. In another embodiment, the traction rib 161 can be fixedly connected to one of the first side wall 111 and the second side wall 112.

[0051] In order to improve the strength of the traction bar 161, ensure that the traction bar 161 and the traction device 20 have a large traction area, which is convenient for traction. In a specific embodiment, the thickness of the first reinforcement 162 (the X-direction dimension of the first reinforcement 162) can be 1mm to 10mm, that is, L1 is greater than or equal to 1mm and less than or equal to 10mm, so as to provide a better support effect for the traction bar 161. The thickness of the traction bar 161 (the Z-direction dimension of the traction bar 161) can be equal to the thickness of the first reinforcement 162, that is, L4 is greater than or equal to 1mm and less than or equal to 10mm, so as to improve the strength of the traction bar 161 itself. Of course, the above-mentioned thickness limit of the traction bar 161 and the first reinforcement 162 is a more preferred embodiment of the present application, and does not limit the present application. For example, the thickness of the first false reinforcement plate can be 0.9mm, 10mm, 11mm, 12mm, 15mm, etc., but is not limited thereto.

[0052] Furthermore, the spacer body 11 has a first opening 15 facing outward (i.e., the side away from the battery cell 30), and the plane where the first opening 15 is located is the first surface, and the distance between the surface inside the traction rib 161 and the first surface is greater than the thickness of the traction rib 161. In other words, the traction rib 161 needs to have a distance that satisfies the above conditions from the first surface where the first opening 15 is located, so as to prevent the traction rib 161 from protruding from the first surface due to deformation and other factors during the pulling process, thereby improving the stability during the pulling process.

[0053] In one embodiment, the base 12 is provided with at least one pressure relief hole 122 so that the pressure relief groove 121 can be connected to the battery cell 30. The number of the pressure relief holes 122 can be one or more, and the shape of the pressure relief holes 122 can be circular, elliptical, rectangular, etc. When a large amount of gas is generated by a fault inside the battery cell 30, the pressure relief groove 121 can discharge the gas inside the battery cell 30 in time through the pressure relief hole 122, thereby effectively avoiding the expansion of the battery cell 30 and preventing the battery cell from exploding, so as to effectively reduce the safety hazards of the battery cell. Therefore, it is easy to understand that the pressure relief groove 121 will withstand a large gas pressure when discharging gas, so the above-mentioned traction ribs 161 and the first reinforcement 162 are arranged in the pressure relief groove 121, which can strengthen the strength of the pressure relief groove 121 and prevent it from being damaged by the pressure of the gas.

[0054] In such Fig.11 and Fig.12 In the illustrated embodiment, the pressure relief holes 122 are provided in a plurality of rows, and the plurality of rows of pressure relief holes 122 are spaced apart along the second direction, and each row of pressure relief holes 122 includes a plurality of pressure relief holes 122, and the shape of the pressure relief holes 122 is a waist-shaped hole, but is not limited thereto. The waist-shaped hole usually has a smaller outlet diameter and a larger internal space, which enables the gas to be released through the orifice in a relatively uniform manner. Compared with holes of other shapes, the waist-shaped hole can better control the flow of gas and reduce the pressure difference generated when the gas is released, thereby improving the pressure relief effect. The base 12 is also provided with a glue injection hole 124, so the size of the pressure relief hole 122 in the area corresponding to the glue injection hole 124 is set to be smaller than the pressure relief holes 122 in other areas.

[0055] In one embodiment, the base 12 is further provided with a hollow area 123, and the hollow area 123 corresponds to the area where the traction bar 161 is located. On the one hand, the hollow area 123 can facilitate the traction device 20 to pull the traction bar 161; on the other hand, the hollow area 123 is connected to the battery cell 30 and the pressure relief groove 121 respectively, and can play a role substantially the same as the pressure relief hole 122, further improving the pressure relief capacity of the pressure relief groove 121. Furthermore, a gap 114 is also provided between the traction bar 161 and the base 12, which can make it easier for the traction device 20 to connect with the traction bar 161.

[0056] In one embodiment, the spacer 10 further includes at least one second reinforcement member 13, the second reinforcement member 13 connects the first side wall 111 and the second side wall 112, the first reinforcement member 162 and the second reinforcement member 13 are arranged in parallel and at intervals, and the interval between the first reinforcement member 162 and the second reinforcement member 13 is set to be greater than a preset interval. It is easy to understand that the more the number of reinforcement plates is, the greater the structural strength of the spacer body 11 can be improved. Therefore, under the premise of improving the structural strength of the spacer body 11, setting the interval between the first reinforcement member 162 and the second reinforcement member 13 to be greater than the preset interval can avoid the second reinforcement member 13 from interfering with the traction device 20.

[0057] It should be noted that the preset interval needs to be set specifically according to the model and size of the traction device 20. Therefore, the embodiment of the present application does not limit the specific value of the preset interval, and those skilled in the art can make specific arrangements based on actual conditions.

[0058] Furthermore, a plurality of second reinforcement members 13 are provided, and the plurality of second reinforcement members 13 are distributed at intervals along the second direction, and a second reinforcement member 13 may be provided between two adjacent pressure relief holes 122 .

[0059] like Fig.11 and Fig.12 In the illustrated embodiment, the second reinforcement member 13 is also a flat plate structure, two second reinforcement members 13 are provided, and the first reinforcement member 162 is located between the two second reinforcement members 13 .

[0060] In one embodiment, the spacer body 11 further includes a bottom wall 113, the bottom wall 113 is fixedly connected to the first side wall 111 and the second side wall 112, the bottom wall 113, the first side wall 111 and the second side wall 112 form a receiving groove 115, the bottom wall 113 is provided with a gap 114, the gap 114 is connected to the receiving groove 115, and the gap 114 is used for the pole ear to pass through, so that part of the structure of the pole ear is received in the receiving groove 115. By receiving the pole ear in the receiving groove 115, the pole ear is separated from the shell 40, so that the pole ear and the shell 40 are kept in an insulated state, thereby effectively preventing the battery short circuit failure caused by the contact between the pole ear and the shell 40, and improving the safety of the battery monomer.

[0061] In a specific embodiment, the shape of the receiving groove 115 can be consistent with the shape of the spacer body 11, that is, the receiving groove 115 can be rectangular. In one embodiment, the spacer body 11 also includes a mounting groove 116 for mounting the spacer 10, and the bottom wall 113 of the mounting groove 116 is provided with a mounting hole 117, and the mounting hole 117 can be used for screws and bolts to pass through.

[0062] The present application also provides a single cell battery, including the spacer 10 in any of the above embodiments. The single cell battery also includes a battery cell 30, a cover plate, and an aluminum shell 40. The battery cell 30 and the spacer 10 are located in the shell 40, and a tab is led out from one end of the battery cell 30, and part of the tab structure is accommodated in the spacer 10, and the tab passes through the spacer 10 and is connected to the cover plate.

[0063] It should be noted that, according to the design of the battery cell, the tabs can be led out at one end of the battery cell 30 or at both ends of the battery cell 30 . Therefore, a spacer 10 can be provided at one end of the battery cell 30 or at both ends of the battery.

[0064] refer to Fig.15 As shown, in one embodiment, the single battery includes a battery cell 30, a housing 40, a positive electrode cover plate 35, a negative electrode cover plate 36, a positive electrode top patch 33 and a negative electrode top patch 34. The battery cell 30 has a positive electrode ear 31 led out at one end where the positive electrode cover plate 35 is installed, and a negative electrode ear 32 led out at one end where the negative electrode cover plate 36 is installed. The spacer 10 is arranged between the battery cell 30 and the positive electrode cover plate 35, and the positive electrode ear 31 passes through the gap 114 of the spacer and is accommodated in the receiving groove 115 of the spacer 10. The positive electrode top patch 33 is attached to the positive electrode cover plate 35, and the negative electrode top patch 34 is attached to the negative electrode cover plate 36.

[0065] An insulating film 37 is attached to the outer surface of the battery cell 30. The material of the insulating film 37 can be Mylar (polyester film), but is not limited to this. By providing the above-mentioned spacer 10, the friction resistance between the deformation of the insulating film 37 and the inner wall of the shell 40 can also be reduced, avoiding the risk of scratching the insulating film 37.

[0066] An embodiment of the present application further provides a vehicle, comprising the spacer 10 and a single battery as described in any of the above embodiments.

[0067] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A spacer, characterized in that: It includes a spacer body and a traction member; the spacer body includes a first side wall, a second side wall and a base, the base is respectively connected to the first side wall and the second side wall, the first side wall, the second side wall and the base form a pressure relief groove; the traction member is formed in the pressure relief groove and is fixedly connected to the spacer body, and the traction member can be applied with traction force to drive the spacer to move.

2. The spacer according to claim 1, characterized in that: The traction member includes a traction rib and a first reinforcement member connected to each other, and the first reinforcement member is fixedly connected to the first side wall and the second side wall.

3. The spacer according to claim 2, characterized in that: The traction bar is fixedly connected to the first reinforcement member.

4. The spacer according to claim 3, characterized in that: The traction rib is convexly arranged on the first reinforcement member.

5. The spacer according to claim 2, characterized in that: The traction rib includes a first traction portion and a second traction portion which are coaxially arranged, and the first traction portion and the second traction portion are respectively protruded on both sides of the first reinforcement member.

6. The spacer according to any one of claims 2 to 5, characterized in that: The first side wall and the second side wall are spaced apart along a first direction, and the traction ribs also extend along the first direction.

7. The spacer according to claim 6, characterized in that The traction ribs are fixedly connected to the first side wall and the second side wall.

8. The spacer according to any one of claims 2 to 5 and 7, characterized in that: The spacer body further includes at least one second reinforcement member formed in the pressure relief groove, the second reinforcement member is fixedly connected to the first side wall and the second side wall, and the second reinforcement member is spaced apart from the first reinforcement member.

9. A battery cell, characterized in that: include: The spacer according to any one of claims 1 to 8; and A battery cell, wherein a pole ear is led out from one end of the battery cell, and at least a part of the structure of the pole ear is accommodated in the spacer.

10. A vehicle, characterized in that: Comprising a spacer as claimed in any one of claims 1 to 8.

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