Battery cycle test fixture

Abstract

The utility model provides a battery cycle test fixture, which relates to the technical field of battery testing and comprises an upper fixing plate and a lower fixing plate. The lower end of the upper fixing piece and the upper end of the lower fixing piece coincide and are connected; the upper through hole is matched with the fixing nut, and the lower through hole is matched with a bolt head of the fixing bolt. According to the battery cycle test fixture provided by the utility model, an upper fixing piece arranged on an upper fixing plate is connected with a lower fixing piece arranged on a lower fixing plate; the upper fixing piece and the lower fixing piece are matched to enable the upper fixing plate and the lower fixing plate to clamp the battery; the bolt head of the fixing bolt is assembled in the lower through hole, the fixing nut is assembled in the upper through hole, and the fixing bolt and the fixing nut cannot rotate, so that the screw on the battery cycle test fixture cannot loosen in the charge-discharge cycle process of the battery.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing, in particular to a battery cycle testing fixture. Background Art

[0002] During cycling, prismatic aluminum-cased lithium-ion batteries experience expansion of the battery casing due to gassing and electrode expansion. Prismatic aluminum-cased batteries are typically used in modules, where they are subject to preload due to structural constraints. Therefore, during actual cycling, the battery expansion does not occur as naturally.

[0003] In order to simulate the actual state in the module, square aluminum shell batteries usually need to be clamped on the large surface of the battery during cycle testing.

[0004] This existing solution has certain defects. Lithium-ion batteries will expand and contract during the cycle, which will cause the fixing screws used to fix the steel plate to loosen, resulting in insufficient pre-tightening force for the battery, which will cause the battery cycle to deteriorate and cannot well simulate the actual working state of the battery in the module. Utility Model Content

[0005] The purpose of the utility model is to provide a battery cycle test fixture to solve the technical problem that the fixing bolts on the existing battery fixture are easy to loosen, resulting in insufficient pre-tightening force for the battery.

[0006] The utility model provides a battery cycle test fixture, comprising an upper fixing plate, a lower fixing plate, a fixing bolt and a fixing nut; at least two upper through-holes are provided on the upper fixing plate, and at least two lower through-holes are provided on the lower fixing plate, and the upper through-holes and the lower through-holes are provided in a one-to-one correspondence;

[0007] An upper fixing member is provided on the upper fixing plate, and the upper fixing member extends toward the lower fixing plate; a lower fixing member is provided on the lower fixing plate, and the lower fixing member extends toward the upper fixing plate;

[0008] The lower end of the upper fixing member overlaps and is connected to the upper end of the lower fixing member;

[0009] The fixing bolt is inserted into the lower through hole and the upper through hole in sequence from the side of the lower fixing plate away from the upper fixing plate and extends out from the upper end surface of the upper fixing plate; the fixing nut is screwed onto the fixing bolt, and the fixing nut is located on the side of the upper fixing plate away from the lower fixing plate;

[0010] The upper fixing member is provided with an upper through hole, the upper through hole is sleeved on the fixing bolt, and one end of the upper fixing member is located on a side of the upper fixing plate away from the lower fixing plate;

[0011] The lower fixing member is provided with a lower through hole, the lower through hole is sleeved on the fixing bolt, and one end of the lower fixing member is located on a side of the lower fixing plate away from the upper fixing plate.

[0012] In an optional embodiment, a fastener is further included, wherein the upper fixing member is provided with an upper adjustment hole, and the lower fixing member is provided with a lower adjustment hole, and the upper adjustment hole and the lower adjustment hole can partially overlap;

[0013] The fastener passes through the upper adjustment hole and the lower adjustment hole in sequence and keeps the upper fixing member and the lower fixing member in contact.

[0014] In an optional embodiment, a fastener is further included, wherein the upper fixing member is provided with an upper adjustment groove, and the lower fixing member is provided with a lower adjustment groove, and the upper adjustment groove and the lower adjustment groove can partially overlap;

[0015] The fastener passes through the upper adjusting slot and the lower adjusting slot in sequence and keeps the upper fixing member and the lower fixing member in contact.

[0016] In an optional embodiment, a plurality of upper fixing protrusions are provided on a side of the upper fixing member facing the lower fixing member; a plurality of lower fixing protrusions are provided on a side of the lower fixing member facing the upper fixing member, and the upper fixing protrusions and the lower fixing protrusions cooperate to prevent the upper fixing member and the lower fixing member from sliding relative to each other.

[0017] In an optional embodiment, the upper fixing member includes a first upper extension portion and a first upper fixing portion; the upper end of the first upper fixing portion is connected to the lower end of the first upper extension portion; the upper adjustment hole and the upper fixing protrusion are both provided on the first upper fixing portion.

[0018] In an optional embodiment, the lower fixing member includes a first lower extension portion and a first lower fixing portion; the lower end of the first lower fixing portion is connected to the upper end of the first lower extension portion; the lower adjustment hole and the lower fixing protrusion are both provided on the first lower fixing portion.

[0019] In an optional embodiment, the bolt head of the fixing bolt is hexagonal.

[0020] In an optional embodiment, the upper fixing plate is rectangular and is provided with four upper through holes.

[0021] The battery cycle test fixture provided by the utility model has an upper fixing piece provided on the upper fixing plate connected to a lower fixing piece provided on the lower fixing plate; the upper fixing piece and the lower fixing piece cooperate to enable the upper fixing plate and the lower fixing plate to clamp the battery; because the bolt head of the fixing bolt is assembled in the lower through hole and the fixing nut is assembled in the upper through hole, the fixing bolt and the fixing nut cannot rotate, so that the screws on the battery cycle test fixture will not loosen during the charge and discharge cycle of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of the structure of a battery cycle test fixture provided by an embodiment of the present utility model;

[0024] Figure 2 for Figure 1 A schematic structural diagram of the battery cycle test fixture from another angle is shown;

[0025] Figure 3 for Figure 1 The figure shows a schematic structural diagram of the connection between the upper fixing member and the lower fixing member of the battery cycle test fixture.

[0026] Icon: 100-upper fixing plate; 101-upper through hole; 200-lower fixing plate; 201-lower through hole; 300-fixing bolt; 400-fixing nut; 500-upper fixing piece; 501-first upper extension; 502-first upper fixing piece; 503-upper fixing protrusion; 504-upper adjustment slot; 505-upper through hole; 600-lower fixing piece; 601-first lower extension; 602-first lower fixing piece; 603-lower fixing protrusion; 604-lower adjustment slot; 605-lower through hole. DETAILED DESCRIPTION

[0027] The terms "first", "second", "third", etc. are only used to distinguish and describe, and do not indicate the order of arrangement, nor can they be understood as indicating or implying relative importance.

[0028] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0029] In the description of this application, it should be noted that the terms "inside", "outside", "left", "right", "up", "down", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application.

[0030] In the description of this application, unless otherwise clearly specified and limited, the terms "set", "install", "connected" and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the internal parts of two elements.

[0031] The technical solution of this application will be clearly and completely described below with reference to the accompanying drawings.

[0032] Example

[0033] Reference Figure 1-Figure 3 The present invention provides a battery cycle test fixture, comprising an upper fixing plate 100, a lower fixing plate 200, a fixing bolt 300, and a fixing nut 400; at least two upper through-holes 101 are provided on the upper fixing plate 100, and at least two lower through-holes 201 are provided on the lower fixing plate 200, and the upper through-holes 101 and the lower through-holes 201 are provided in a one-to-one correspondence;

[0034] An upper fixing member 500 is provided on the upper fixing plate 100, and the upper fixing member 500 extends toward the lower fixing plate 200; a lower fixing member 600 is provided on the lower fixing plate 200, and the lower fixing member 600 extends toward the upper fixing plate 100;

[0035] The lower end of the upper fixing member 500 overlaps with and is connected to the upper end of the lower fixing member 600 .

[0036] The fixing bolt 300 is inserted into the lower through-hole 201 and the upper through-hole 101 in sequence from the side of the lower fixing plate 200 away from the upper fixing plate 100 and extends out from the upper end surface of the upper fixing plate 100; the fixing nut 400 is screwed onto the fixing bolt 300, and the fixing nut 400 is located on the side of the upper fixing plate 100 away from the lower fixing plate 200;

[0037] The upper fixing member 500 is provided with an upper through hole 505, and the upper through hole 505 is sleeved on the fixing bolt 300, and one end of the upper fixing member 500 is located on a side of the upper fixing plate 100 away from the lower fixing plate 200;

[0038] The lower fixing member 600 is provided with a lower through hole 605, and the lower through hole 605 is sleeved on the fixing bolt 300, and one end of the lower fixing member 600 is located on a side of the lower fixing plate 200 away from the upper fixing plate 100;

[0039] The upper through hole 505 matches the fixing nut 400 , and the lower through hole 605 matches the bolt head of the fixing bolt 300 .

[0040] In some embodiments, an upper fixing member 500 is provided on the upper fixing plate 100, and a lower fixing member 600 is provided on the lower fixing plate 200; when the upper fixing plate 100 and the lower fixing plate 200 clamp the battery, the upper fixing member 500 is connected to the lower fixing member 600. This solves the problem that the battery will expand and contract during the cycle, which will cause the fixing screws used to fix the upper fixing plate 100 and the lower fixing plate 200 to loosen, thereby resulting in insufficient pre-tightening force for the battery, which will cause the battery cycle to deteriorate and fail to simulate the actual working state of the battery in the module well.

[0041] The upper fixing plate 100 is generally provided with four upper through holes 101 , and the lower fixing plate 200 is provided with four lower through holes 201 , and the four upper through holes 101 are arranged in a rectangular shape; the battery to be tested is located between the upper fixing plate 100 and the lower fixing plate 200 .

[0042] The fixing bolt 300 is inserted from the lower through-hole 201 of the lower fixing plate 200 and continues to be inserted into the upper through-hole 101 of the upper fixing plate 100. The fixing bolt 300 extends from the upper end of the upper fixing plate 100, and the fixing nut 400 is screwed onto the fixing bolt 300. In this way, the upper fixing plate 100 and the lower fixing plate 200 are connected and fixed by the fixing bolt 300. The upper fixing plate 100 and the lower fixing plate 200 cooperate to clamp the battery, simulating the working state of the battery in the battery module.

[0043] The bolt heads of the fixing bolts 300 are regular hexagonal, and the bolt heads of the four fixing bolts 300 can support the battery cycle test fixture.

[0044] Generally, the upper through hole 505 and the lower through hole 605 are both regular hexagons; after the upper fixing plate 100 and the lower fixing plate 200 clamp the battery, the upper through hole 505 of the upper fixing part 500 is sleeved on the fixing nut 400, and the lower through hole 605 of the lower fixing plate 200 is sleeved on the bolt head of the fixing bolt 300. Since the upper fixing part 500 and the lower fixing part 600 are connected, the upper fixing part 500 and the lower fixing part 600 cannot rotate, that is, the fixing nut 400 and the fixing bolt 300 cannot rotate either. In this way, the screws on the battery cycle test fixture will not loosen during the charge and discharge cycle of the battery.

[0045] The upper fixing member 500 and the lower fixing member 600 are connected to further fix the upper fixing plate 100 and the lower fixing plate 200, solving the problem of expansion and contraction of the battery during the cycle, which will cause the fixing bolt 300 to loosen, thereby resulting in insufficient pre-tightening force for the battery.

[0046] An upper through hole 505 is provided on the upper fixing member 500, and a lower through hole 605 is provided on the lower fixing member 600; the fixing bolt 300 is inserted into the lower through hole 605 of the lower fixing member 600, the lower through hole 201 of the lower fixing plate 200, the upper through hole 101 of the upper fixing plate 100 and the upper through hole 505 of the upper fixing member 500 in sequence; after the fixing nut 400 is screwed onto the fixing bolt 300, the fixing nut 400 and the bolt head of the fixing bolt 300 enable the upper fixing plate 100 and the lower fixing plate 200 to clamp the battery and apply a pre-tightening force simulating the battery pack; the upper fixing member 500 and the lower fixing member 600 are connected, and the upper fixing member 500 and the lower fixing member 600 cannot rotate, that is, the fixing nut 400 and the fixing bolt 300 cannot rotate, so that the fixing nut 400 will not loosen.

[0047] In an optional embodiment, a fastener is further included, wherein the upper fixing member 500 is provided with an upper adjustment hole, and the lower fixing member 600 is provided with a lower adjustment hole, and the upper adjustment hole and the lower adjustment hole can partially overlap;

[0048] The fasteners pass through the upper adjustment hole and the lower adjustment hole in sequence and keep the upper fixing member 500 and the lower fixing member 600 in contact with each other.

[0049] A fastener is inserted into the upper adjustment hole and the lower adjustment hole to keep the upper fixing member 500 and the lower fixing member 600 in contact; the fastener is generally a fastening bolt, which is inserted into the upper adjustment hole and the lower adjustment hole in turn, so that the upper fixing member 500 and the lower fixing member 600 can be kept in contact.

[0050] In an optional embodiment, a fastener is further included, wherein the upper fixing member 500 is provided with an upper adjustment groove 504, and the lower fixing member 600 is provided with a lower adjustment groove 604, and the upper adjustment groove 504 and the lower adjustment groove 604 can partially overlap;

[0051] The fastener passes through the upper adjustment slot 504 and the lower adjustment slot 604 in sequence and keeps the upper fixing member 500 and the lower fixing member 600 in contact with each other.

[0052] In some embodiments, a fastener is inserted into the upper adjustment groove 504 and the lower adjustment groove 604 to keep the upper fixing member 500 and the lower fixing member 600 in contact; the fastener is generally a fastening bolt, which is inserted into the upper adjustment groove 504 and the lower adjustment groove 604 in turn, so that the upper fixing member 500 and the lower fixing member 600 can be kept in contact.

[0053] Reference Figure 1 and Figure 3 In an optional embodiment, a plurality of upper fixing protrusions 503 are provided on a side of the upper fixing member 500 facing the lower fixing member 600; a plurality of lower fixing protrusions 603 are provided on a side of the lower fixing member 600 facing the upper fixing member 500, and the upper fixing protrusions 503 and the lower fixing protrusions 603 cooperate to prevent the upper fixing member 500 and the lower fixing member 600 from sliding relative to each other.

[0054] A plurality of upper fixing protrusions 503 are sequentially arranged in the height direction of the upper fixing member 500, and a plurality of lower fixing protrusions 603 are sequentially arranged in the height direction of the lower fixing member 600. The upper fixing protrusions 503 and the lower fixing protrusions 603 can be engaged with each other; when the fixing bolts 300 and the fixing nuts 400 cooperate to clamp the upper fixing plate 100 and the lower fixing plate 200 to clamp the battery, the battery expands and contracts during the cycle, and the upper fixing member 500 and the lower fixing member 600 cooperate to prevent the fixing nuts 400 from loosening easily.

[0055] In an optional embodiment, the upper fixing member 500 includes a first upper extension portion 501 and a first upper fixing portion 502; the upper end of the first upper fixing portion 502 is connected to the lower end of the first upper extension portion 501; the upper adjustment hole and the upper fixing protrusion 503 are both arranged on the first upper fixing portion 502.

[0056] In an optional embodiment, the lower fixing member 600 includes a first lower extension portion 601 and a first lower fixing portion 602; the lower end of the first lower fixing portion 602 is connected to the upper end of the first lower extension portion 601; the lower adjustment hole and the lower fixing protrusion 603 are both arranged on the first lower fixing portion 602.

[0057] The battery cycle test fixture provided by the present invention has an upper fixing piece 500 provided on the upper fixing plate 100 connected to a lower fixing piece 600 provided on the lower fixing plate 200; the upper fixing piece 500 and the lower fixing piece 600 cooperate to enable the upper fixing plate 100 and the lower fixing plate 200 to clamp the battery; since the bolt head of the fixing bolt 300 is assembled in the lower through hole 605 and the fixing nut 400 is assembled in the upper through hole 505, the fixing bolt 300 and the fixing nut 400 cannot rotate, so that the screws on the battery cycle test fixture will not loosen during the charge and discharge cycle of the battery.

[0058] When the bolt heads of the fixing nut 400 and the fixing bolt 300 are in other shapes, the shapes of the upper through hole 505 and the lower through hole 605 are changed accordingly.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery cycle test fixture, characterized in that: The invention comprises an upper fixing plate (100), a lower fixing plate (200), a fixing bolt (300) and a fixing nut (400); at least two upper through holes (101) are provided on the upper fixing plate (100), and at least two lower through holes (201) are provided on the lower fixing plate (200), and the upper through holes (101) and the lower through holes (201) are provided in a one-to-one correspondence; The fixing bolt (300) is inserted into the lower through hole (201) and the upper through hole (101) in sequence from the side of the lower fixing plate (200) away from the upper fixing plate (100) and extends from the upper end surface of the upper fixing plate (100); the fixing nut (400) is screwed onto the fixing bolt (300), and the fixing nut (400) is located on the side of the upper fixing plate (100) away from the lower fixing plate (200); An upper fixing member (500) is provided on the upper fixing plate (100), and the upper fixing member (500) extends toward the lower fixing plate (200); a lower fixing member (600) is provided on the lower fixing plate (200), and the lower fixing member (600) extends toward the upper fixing plate (100); The lower end of the upper fixing member (500) overlaps and is connected to the upper end of the lower fixing member (600); An upper through hole (505) is provided on the upper fixing member (500), and the upper through hole (505) is sleeved on the fixing bolt (300), and one end of the upper fixing member (500) is located on a side of the upper fixing plate (100) away from the lower fixing plate (200); The lower fixing member (600) is provided with a lower through hole (605), the lower through hole (605) is sleeved on the fixing bolt (300), and one end of the lower fixing member (600) is located on a side of the lower fixing plate (200) away from the upper fixing plate (100); The upper through hole (505) matches the fixing nut (400), and the lower through hole (605) matches the bolt head of the fixing bolt (300).

2. The battery cycle test fixture according to claim 1, characterized in that: It also includes a fastener, wherein the upper fixing member (500) is provided with an upper adjustment hole, and the lower fixing member (600) is provided with a lower adjustment hole, and the upper adjustment hole and the lower adjustment hole can partially overlap; The fastener passes through the upper adjustment hole and the lower adjustment hole in sequence, and keeps the upper fixing member (500) and the lower fixing member (600) in contact with each other.

3. The battery cycle test fixture according to claim 1, characterized in that: It also includes a fastener, wherein the upper fixing member (500) is provided with an upper adjustment groove (504), and the lower fixing member (600) is provided with a lower adjustment groove (604), and the upper adjustment groove (504) and the lower adjustment groove (604) can partially overlap; The fastener passes through the upper adjustment slot (504) and the lower adjustment slot (604) in sequence and keeps the upper fixing member (500) and the lower fixing member (600) in contact with each other.

4. The battery cycle test fixture according to claim 2 or 3, characterized in that: A plurality of upper fixing protrusions (503) are provided on a side of the upper fixing member (500) facing the lower fixing member (600); a plurality of lower fixing protrusions (603) are provided on a side of the lower fixing member (600) facing the upper fixing member (500), and the upper fixing protrusions (503) and the lower fixing protrusions (603) cooperate to prevent the upper fixing member (500) and the lower fixing member (600) from sliding relative to each other.

5. The battery cycle test fixture according to claim 4, characterized in that: The upper fixing member (500) comprises a first upper extension portion (501) and a first upper fixing portion (502); the upper end of the first upper fixing portion (502) is connected to the lower end of the first upper extension portion (501); and the upper fixing protrusion (503) is provided on the first upper fixing portion (502).

6. The battery cycle test fixture according to claim 4, characterized in that: The lower fixing member (600) comprises a first lower extension portion (601) and a first lower fixing portion (602); the lower end of the first lower fixing portion (602) is connected to the upper end of the first lower extension portion (601); and the lower fixing protrusion (603) is provided on the first lower fixing portion (602).

7. The battery cycle test fixture according to claim 1, characterized in that: The bolt head of the fixing bolt (300) is hexagonal.

8. The battery cycle test fixture according to claim 1, characterized in that: The upper fixing plate (100) is rectangular, and is provided with four upper through holes (101).

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