Glue injection jig and glue injection equipment

Abstract

The invention relates to a glue injection jig and glue injection equipment. The glue injection jig comprises a first pressing and holding piece, a second pressing and holding piece and at least one limiting piece. The first pressing and holding piece and the second pressing and holding piece are oppositely arranged in a spaced mode in the first direction, the at least one limiting piece is located between the first pressing and holding piece and the second pressing and holding piece in the first direction, and the first pressing and holding piece, the second pressing and holding piece and the at least one limiting piece define a containing cavity used for containing a battery cell; and a glue injection opening communicated with the accommodating cavity is formed in the cavity wall of the accommodating cavity. The probability of contact between the positive pole piece and the negative pole piece in the solid-state battery due to a gap between the positive pole piece and the negative pole piece can be reduced, so that the problem that the solid-state battery is easy to short-circuit is solved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a glue injection jig and glue injection equipment. Background Art

[0002] A solid-state battery is a battery that uses solid electrodes and solid electrolytes. The production process of a solid-state battery includes pressing together the dried positive electrode sheet, negative electrode sheet and electrolyte membrane to form a solid-state battery. However, traditional solid-state batteries are prone to short circuit problems. Summary of the invention

[0003] Based on this, it is necessary to provide a glue injection jig and glue injection equipment to address the above technical problems, which can inject glue into the gap between the positive electrode plate and the negative electrode plate to form a relatively dense solid electrolyte, thereby solving the problem of short circuit in solid-state batteries.

[0004] According to the first aspect of the present application, a glue injection jig is provided, comprising a first pressing member, a second pressing member and at least one limiting member. The first pressing member and the second pressing member are arranged opposite to each other and spaced apart along a first direction, and the at least one limiting member is located between the first pressing member and the second pressing member along the first direction, wherein the first pressing member, the second pressing member and the at least one limiting member enclose a receiving cavity for receiving a battery cell, and a glue injection port connected to the receiving cavity is provided on the cavity wall of the receiving cavity. The first pressing member is provided with a cooling water inlet and a cooling water outlet connected to each other; and / or, the second pressing member is provided with a cooling water inlet and a cooling water outlet connected to each other; and / or, the limiting member is provided with a cooling water inlet and a cooling water outlet connected to each other.

[0005] In the technical solution of the present application, the battery cell (the battery cell may include a stacked positive electrode sheet, a solid electrolyte membrane sheet and a negative electrode sheet) can be placed in a receiving cavity surrounded by a first pressing member, a second pressing member and at least one stopper, and the electrolyte glue liquid is injected into the receiving cavity through the glue injection port. After the electrolyte glue liquid is solidified, the glue injection jig can be removed. In this way, the gap between the positive electrode sheet and the negative electrode sheet can be injected to form a solid electrolyte, so that the gap between the positive electrode sheet and the negative electrode sheet can be filled more densely by the solid electrolyte, thereby reducing the probability of the positive electrode sheet and the negative electrode sheet in the solid-state battery contacting each other due to the gap between them, thereby solving the problem of the solid-state battery being prone to short circuit. In addition, the battery cell and the electrolyte glue liquid in the receiving cavity can be cooled by means of a cooling water inlet and a cooling water outlet, so that the electrolyte glue liquid in the receiving cavity is solidified and the battery cell after injection is easy to be demolded.

[0006] In one embodiment, the glue injection jig includes a plurality of limiters, which are arranged around an axis parallel to the first direction and are connected end to end in sequence. The plurality of limiters can be arranged around the battery cell, and the plurality of limiters and the first pressing member and the second pressing member can form a closed accommodating cavity, which is beneficial to improving the glue injection effect of the glue injection jig.

[0007] In one embodiment, the plurality of limit members include two first limit members that are opposite to and spaced apart from each other along the second direction, and two second limit members that are opposite to and spaced apart from each other along the third direction. The first pressing member, the second pressing member, the two first limit members, and the two second limit members surround an accommodating cavity, and the first direction, the second direction, and the third direction intersect with each other. The two first limit members are opposite to and spaced apart from each other along the second direction, so that the battery cell can be limited between the two first limit members along the second direction, and the two second limit members are opposite to and spaced apart from each other along the third direction, so that the battery cell can be limited between the two second limit members along the third direction. In this way, the battery cell can be more stably fixed in the accommodating cavity, which facilitates the glue injection operation of the battery cell in the accommodating cavity through the glue injection port.

[0008] In one embodiment, at least one first stopper can move along the second direction, and the spacing between the two first stoppers along the second direction can be adjusted according to the size of the battery cell along the second direction, so that the glue injection jig can be applied to battery cells of different sizes, and it is also convenient to place or remove the battery cell from the accommodation cavity. And / or, at least one second stopper can move along the third direction, and the spacing between the two second stoppers along the third direction can be adjusted according to the size of the battery cell along the third direction, so that the glue injection jig can be applied to battery cells of different sizes, and it is also convenient to place or remove the battery cell from the accommodation cavity.

[0009] In one embodiment, the glue injection jig further comprises a first fixing member and a first adjusting member; along the second direction, the first fixing member is arranged on a side of a first limiting member away from another first limiting member; the first adjusting member is arranged on the first fixing member and connected to the adjacent first limiting member to drive the adjacent first limiting member to move along the second direction, so that it is convenient to adjust the spacing between the two first limiting members along the second direction according to the size of the battery cell along the second direction, so that the glue injection jig can be applied to batteries of different sizes, and it is also convenient to place or remove the battery cell from the accommodation cavity. And / or, the glue injection jig further comprises a second fixing member and a second adjusting member, along the third direction, the second fixing member is arranged on a side of a second limiting member away from another second limiting member; the second adjusting member is arranged on the second fixing member and connected to the adjacent second limiting member to drive the adjacent second limiting member to move along the third direction, so that it is convenient to adjust the spacing between the two second limiting members along the third direction according to the size of the battery cell along the third direction, so that the glue injection jig can be applied to batteries of different sizes, and it is also convenient to place or remove the battery cell from the accommodation cavity.

[0010] In one embodiment, at least one of the first pressing member and the second pressing member can move along the first direction. The spacing between the first pressing member and the second pressing member along the first direction is adjusted according to the size of the battery cell along the first direction, so that the glue injection jig can be applicable to battery cells of different sizes and is also convenient for placing or removing the battery cell from the accommodation cavity.

[0011] In one embodiment, the glue injection jig further includes a third fixing member and a third adjusting member. Along the first direction, the third fixing member is arranged on a side of the first pressing member away from the second pressing member. The third adjusting member is arranged on the third fixing member and is connected to a side of the first pressing member away from the second pressing member to drive the first pressing member to move along the first direction. The first pressing member can be driven to move along the first direction by the third adjusting member, thereby adjusting the position of the first pressing member along the first direction, and then adjusting the distance between the first pressing member and the second pressing member along the first direction according to the size of the battery cell along the first direction, so that the glue injection jig can be applied to battery cells of different sizes and is also convenient for placing or removing the battery cell from the accommodating cavity.

[0012] In one embodiment, the third adjusting member includes a plurality of bolts, and the total pressure applied by the plurality of bolts to the first holding member is P1, wherein 3Mpa≤P1≤5Mpa. The total pressure applied by the plurality of bolts to the first holding member is set within a suitable range, for example, P1 is set within the range of 3Mpa≤P1≤5Mpa, so that it is beneficial to use the first holding member to apply sufficient pressure to the battery cell without causing damage to the battery cell.

[0013] In one embodiment, at least one of the first pressing member, the second pressing member and the stopper is provided with a heating member. The heating member can be used to heat at least one of the first pressing member, the second pressing member and the stopper, and then heat the glue injection jig, so as to achieve the hot pressing clamping operation of the battery cell. After the glue injection is completed, the heating member can stop heating and the glue injection jig can be cooled so that the electrolyte glue in the accommodating cavity is solidified and the battery cell after the glue injection is easy to demould.

[0014] In one embodiment, at least one of the first holding member, the second holding member and the limiting member is provided with an exhaust port connected to the accommodating cavity. Before injecting glue (such as electrolyte glue) into the accommodating cavity through the glue injection port, the exhaust port can be used to evacuate the accommodating cavity, which is convenient for glue injection in a vacuum environment and can better improve the gap filling effect of the battery cell. After injecting glue (such as electrolyte glue) into the accommodating cavity through the glue injection port, the exhaust port can be used to exhaust gas, which can reduce the probability of trapped air in the injected electrolyte glue and can better improve the gap filling effect of the battery cell.

[0015] In one embodiment, the exhaust port is disposed at the top of the cavity wall of the accommodating cavity. Since the exhaust port is disposed at the top of the cavity wall of the accommodating cavity, during the process of injecting glue (such as electrolyte glue) into the accommodating cavity through the glue injection port, bubbles can move upward driven by the injection power of the glue, and can be well discharged through the exhaust port at the top, thereby reducing the probability of trapped air in the injected electrolyte glue, and better improving the gap filling effect of the battery cell.

[0016] In one of the embodiments, the glue injection port is disposed at the bottom of the cavity wall of the accommodating cavity. Since the glue injection port is disposed at the bottom of the cavity wall of the accommodating cavity, the liquid level of the glue can be gradually raised during the process of injecting glue (such as electrolyte glue) into the accommodating cavity through the glue injection port, so that the gas in the glue can be better driven by the injection power of the glue to move upward, thereby reducing the probability of gas entrapment in the injected electrolyte glue, and better improving the gap filling effect of the battery cell.

[0017] In one embodiment, the cavity wall of the accommodating cavity includes a first diagonal portion and a second diagonal portion that are arranged opposite to each other along a diagonal direction, the first diagonal portion is located at the bottom of the cavity wall of the accommodating cavity, the second diagonal portion is located at the top of the cavity wall of the accommodating cavity, and the first direction and the diagonal direction are arranged to intersect. An exhaust port that communicates with the accommodating cavity is provided on the cavity wall of the accommodating cavity, the glue injection port is provided at the first diagonal portion, and the exhaust port is provided at the second diagonal portion. In this way, the first diagonal portion and the second diagonal portion can form a low point and a high point respectively, and the spacing between the first diagonal portion and the second diagonal portion is larger (the diagonal line is longer), so that in the process of injecting glue (such as electrolyte glue) into the accommodating cavity through the glue injection port, the glue can rise more slowly from the low point, which will drive the bubbles in the glue to rise slowly, so that the bubbles in the glue can be discharged more easily (can be discharged from the exhaust port on the top), and thus the probability of trapped air in the injected electrolyte glue can be greatly reduced, and thus the gap filling effect of the battery cell can be better improved, which is conducive to the formation of a denser solid electrolyte in the battery cell, thereby solving the problem of short circuit in solid-state batteries, and also greatly improving the shear fracture problem after static pressure.

[0018] In one embodiment, the glue injection jig also includes a base, and the second holding member is disposed on the base. The limiter is arranged at an acute angle to the target plane, wherein the target plane is perpendicular to the thickness direction of the base. Since the limiter is arranged at an acute angle to the target plane, the glue injection jig can be placed in an oblique state, and in the process of injecting glue (such as electrolyte glue) into the accommodating cavity through the glue injection port, the glue can rise more slowly from a low place, so that the bubbles in the glue can be discharged more easily through the exhaust port, and the probability of trapped air in the injected electrolyte glue can be greatly reduced, and the gap filling effect of the battery cell can be better improved, which is conducive to the formation of a denser solid electrolyte in the battery cell, thereby solving the problem of short circuit in solid-state batteries, and can also well improve the shear fracture problem after static pressure.

[0019] In one embodiment, the angle between one of the stoppers and the target plane is ɑ, and ɑ satisfies the following condition: 30°≤ɑ≤60°. Setting ɑ within an appropriate range is conducive to making the spacing between the diagonal of one side of the accommodating cavity and the diagonal of the other side sufficiently large, thereby helping to reduce the probability of trapped air in the injected electrolyte gel, thereby better improving the gap filling effect of the battery cell, and helping to form a denser solid electrolyte in the battery cell, thereby solving the problem of short circuit in solid-state batteries, and also greatly improving the shear fracture problem after static pressure.

[0020] In one embodiment, the glue injection jig further includes a base, and the second pressing member is disposed on the base. The first pressing member has a first pressing surface disposed opposite to the second pressing member along a first direction, and the first pressing surface is disposed at an angle β to the thickness direction of the base, wherein β satisfies the following condition: 0°<β<90°. In the process of injecting glue (such as electrolyte glue) into the accommodating cavity through the glue injection port, the closer the liquid level of the glue is to the top of the accommodating cavity, the greater the amount of glue. Compared with the first holding surface being perpendicular to the horizontal plane, the first holding surface is arranged at an acute angle to the thickness direction of the base, so that the liquid level of the glue in the accommodating cavity can be in a non-horizontal state. In this way, even in the case of a large amount of glue, the bubbles can rise along the liquid level of the glue under the driving force of the injection of the glue and be discharged through the exhaust port on the top, which is beneficial to reduce the probability of trapped air in the injected electrolyte glue, and thus can better improve the gap filling effect of the battery cell, which is beneficial to form a denser solid electrolyte in the battery cell, thereby solving the problem of short circuit in solid-state batteries, and can also greatly improve the shear fracture problem after static pressure.

[0021] In one embodiment, 0°<β≤45°. Setting the angle between the first holding surface and the thickness direction of the base within a suitable range can make the liquid surface of the glue in the accommodating cavity non-horizontal, and the bubbles have enough time to climb upward on the liquid surface of the glue, thereby greatly reducing the probability of trapped air in the injected electrolyte glue, thereby better improving the gap filling effect of the battery cell, which is conducive to forming a denser solid electrolyte in the battery cell, thereby solving the problem of short circuit in solid-state batteries, and also greatly improving the shear fracture problem after static pressure.

[0022] According to the second aspect of the present application, a glue injection device is provided, comprising a glue injection jig and a glue valve module according to any of the above embodiments, wherein the glue valve module has a glue outlet connected to the glue injection port. Glue (such as electrolyte glue) can be injected into the glue injection port of the glue injection jig through the glue valve module, and then the gap between the positive electrode plate and the negative electrode plate of the battery cell can be injected to form a solid electrolyte, so that the gap between the positive electrode plate and the negative electrode plate can be filled more densely by the solid electrolyte, thereby reducing the probability of the positive electrode plate and the negative electrode plate in the solid-state battery contacting each other due to the gap between them, thereby solving the problem of short circuit in the solid-state battery.

[0023] In one embodiment, the glue injection device further includes a controller, which is electrically connected to the glue valve module to adjust the speed, pressure and / or flow rate of the glue liquid output from the glue outlet of the glue valve module. The glue liquid can be injected into the receiving cavity at a suitable speed, pressure and / or flow rate, thereby improving the glue injection effect of the battery cell.

[0024] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0026] Figure 1 A schematic structural diagram of a glue injection jig in an embodiment of the present application at a first viewing angle is shown.

[0027] Figure 2 A schematic structural diagram of a glue injection jig in an embodiment of the present application at a second viewing angle is shown.

[0028] Figure 3A schematic structural diagram of a glue injection jig in an embodiment of the present application from a third viewing angle is shown.

[0029] Figure 4 A side view of a glue injection jig in one embodiment of the present application is shown.

[0030] Figure 5 A front view of a glue injection jig in one embodiment of the present application is shown.

[0031] Figure 6 A side view of a glue injection jig in another embodiment of the present application is shown.

[0032] Figure numerals: 10, glue injection jig; 110, first holding member; 111, first holding surface; 120, second holding member; 130, third fixing member; 140, third adjusting member; 150, positioning member; 160, hand-held portion; 170, connecting member; 210, limiting member; 210a, first limiting member; 210b, second limiting member; 221, first fixing member; 222, second fixing member; 231, first adjusting member; 232, third Two adjusting parts; R, accommodating cavity; R1, first diagonal part; R2, second diagonal part; J, glue injection port; P, exhaust port; K1, cooling water inlet; K2, cooling water outlet; 300, heating element; 410, base; 420, support frame; 430, mounting seat; 431, clamping part; 432, seat body; 4311, bearing surface; 500, glue valve mounting part; 600, glue injection tube; 20, glue valve module; 21, glue nozzle; C, glue outlet. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0034] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0035] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0037] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0039] A solid-state battery is a battery that uses solid electrodes and solid electrolytes. The production process of a solid-state battery includes pressing together the dried positive electrode sheet, negative electrode sheet and electrolyte membrane to form a solid-state battery. However, traditional solid-state batteries are prone to short circuit problems.

[0040] In order to solve the problem that traditional solid-state batteries are prone to short circuits, the present application designs a glue injection fixture that can inject glue into the gap between the positive electrode plate and the negative electrode plate to form a relatively dense solid electrolyte, thereby solving the problem that solid-state batteries are prone to short circuits.

[0041] The glue injection jig and / or glue injection equipment disclosed in the embodiments of the present application can be used, but is not limited to, in the production of solid-state batteries.

[0042] Figure 1-Figure 3 The schematic diagram of the structure of the glue injection jig 10 in one embodiment of the present application at different viewing angles is shown.

[0043] Please refer to Figure 1-Figure 3 An embodiment of the present application provides a glue injection jig 10 , including a first pressing member 110 , a second pressing member 120 and at least one limiting member 210 .

[0044] The first pressing member 110 and the second pressing member 120 are disposed opposite to each other and spaced apart along the first direction F1 .

[0045] At least one limiting member 210 is located between the first pressing member 110 and the second pressing member 120 along the first direction F1. The first pressing member 110, the second pressing member 120 and the at least one limiting member 210 surround a receiving cavity R for receiving the battery cell. A glue injection port J connected to the receiving cavity R is provided on the cavity wall of the receiving cavity R.

[0046] The first pressing member 110 and the second pressing member 120 are two components that are spaced apart along the first direction F1 and are used to clamp the battery cell between the first pressing member 110 and the second pressing member 120 .

[0047] The limiting member 210 is located between the first pressing member 110 and the second pressing member 120 along the first direction F1 and is used to limit the battery cell in the accommodating cavity R.

[0048] The accommodating cavity R is used to accommodate the battery cell, and the glue injection port J is used to communicate with the accommodating cavity R, and glue (such as electrolyte glue) can be injected into the accommodating cavity R through the glue injection port J.

[0049] When the glue injection jig 10 of the present application is used, the battery cell (the battery cell may include a stacked positive electrode sheet, a solid electrolyte membrane sheet and a negative electrode sheet) can be placed in a receiving cavity R surrounded by a first pressing member 110, a second pressing member 120 and at least one limiting member 210, and an electrolyte glue liquid is injected into the receiving cavity R through a glue injection port J. After the electrolyte glue liquid is solidified, the glue injection jig 10 can be removed. In this way, a solid electrolyte can be formed by injecting glue in the gap between the positive electrode sheet and the negative electrode sheet, so that the gap between the positive electrode sheet and the negative electrode sheet can be filled more densely with the solid electrolyte, thereby reducing the probability of the positive electrode sheet and the negative electrode sheet in the solid-state battery contacting each other due to the gap between them, thereby solving the problem of short circuit in the solid-state battery.

[0050] In some embodiments, the first holding member 110 is provided with a cooling water inlet K1 and a cooling water outlet K2 which are communicated with each other.

[0051] In this way, the coolant can flow in from the cooling water inlet K1 on the first pressing member 110 and flow out from the cooling water outlet K2 on the first pressing member 110, thereby cooling the first pressing member 110, and then cooling the battery cell and electrolyte glue in the accommodating cavity R, so that the electrolyte glue in the accommodating cavity R can be solidified and the battery cell can be demolded easily after glue injection.

[0052] In some other embodiments, the second holding member 120 is provided with a cooling water inlet K1 and a cooling water outlet K2 which are communicated with each other.

[0053] In this way, the coolant can flow in from the cooling water inlet K1 on the second pressing member 120 and flow out from the cooling water outlet K2 on the second pressing member 120, thereby cooling the second pressing member 120, and then cooling the battery cell and electrolyte glue in the accommodating cavity R, so that the electrolyte glue in the accommodating cavity R can be solidified and the battery cell can be demolded easily after glue injection.

[0054] In another embodiment, the limiting member 210 is provided with a cooling water inlet K1 and a cooling water outlet K2 which are communicated with each other.

[0055] For example, each limiting member 210 is provided with a cooling water inlet K1 and a cooling water outlet K2 which are communicated with each other.

[0056] In this way, the coolant can flow in from the cooling water inlet K1 on the limit member 210 and flow out from the cooling water outlet K2 on the limit member 210, thereby cooling the limit member 210, and further cooling the battery cell and electrolyte glue in the accommodating cavity R, so that the electrolyte glue in the accommodating cavity R can be solidified and the demolding of the battery cell after glue injection can be facilitated.

[0057] In some embodiments, the glue injection jig 10 includes a plurality of stoppers 210 , which are arranged around an axis parallel to the first direction F1 and are connected end to end in sequence.

[0058] In this way, multiple limiting members 210 can be arranged around the battery cell, and the multiple limiting members 210 and the first pressing member 110 and the second pressing member 120 can form a closed accommodating cavity R, which is beneficial to improve the injection effect of the injection fixture 10.

[0059] In some embodiments, the plurality of stoppers 210 include two first stoppers 210a disposed opposite and spaced apart along the second direction F2, and two second stoppers 210b disposed opposite and spaced apart along the third direction F3. The first pressing member 110, the second pressing member 120, the two first stoppers 210a, and the two second stoppers 210b surround an accommodating cavity R. The first direction F1, the second direction F2, and the third direction F3 intersect each other.

[0060] Optionally, the first direction F1, the second direction F2 and the third direction F3 are perpendicular to each other. For example, the first direction F1 is parallel to the thickness direction of the battery cell, the second direction F2 is parallel to the width direction of the battery cell, and the third direction F3 is parallel to the length direction of the battery cell.

[0061] The two first limiting members 210a are arranged opposite to each other and spaced apart along the second direction F2, so that the battery cell can be limited between the two first limiting members 210a along the second direction F2. The two second limiting members 210b are arranged opposite to each other and spaced apart along the third direction F3, so that the battery cell can be limited between the two second limiting members 210b along the third direction F3. In this way, the battery cell can be more stably fixed in the accommodating cavity R, which facilitates the glue injection operation on the battery cell in the accommodating cavity R through the glue injection port J.

[0062] In some embodiments, at least one first limiting member 210a is capable of moving along the second direction F2.

[0063] Alternatively, one of the first position-limiting members 210 a may be movable along the second direction F2 ; or both of the first position-limiting members 210 a may be movable along the second direction F2 .

[0064] In this way, the distance between the two first limiting members 210a along the second direction F2 can be adjusted according to the size of the battery cell along the second direction F2, so that the injection fixture 10 can be suitable for battery cells of different sizes and is also convenient for placing or removing the battery cell from the accommodating cavity R.

[0065] In some other embodiments, at least one second limiting member 210b is capable of moving along the third direction F3.

[0066] Alternatively, one of the second position-limiting members 210 b may be movable along the third direction F3 ; or both of the second position-limiting members 210 b may be movable along the third direction F3 .

[0067] In this way, the distance between the two second limiting members 210b along the third direction F3 can be adjusted according to the size of the battery cell along the third direction F3, so that the injection fixture 10 can be suitable for battery cells of different sizes and is also convenient for placing or removing the battery cell from the accommodating cavity R.

[0068] In some other embodiments, at least one first limiting member 210a is capable of moving along the second direction F2, and at least one second limiting member 210b is capable of moving along the third direction F3.

[0069] In this way, the glue injection jig 10 can be better adapted to battery cells of different sizes, and the battery cells can be easily placed or removed from the accommodation cavity R.

[0070] In some embodiments, the glue injection jig 10 also includes a first fixing member 221 and a first adjusting member 231. Along the second direction F2, the first fixing member 221 is arranged on a side of a first limiting member 210a away from another first limiting member 210a, and the first adjusting member 231 is arranged on the first fixing member 221 and is connected to the adjacent first limiting member 210a to drive the adjacent first limiting member 210a to move along the second direction F2.

[0071] The first fixing member 221 is a component used to install or fix the first adjusting member 231 .

[0072] The first adjusting member 231 is a component used to adjust the position of the adjacent first limiting member 210 a along the second direction F2 . For example, the first adjusting member 231 may be a bolt.

[0073] In this way, the first adjusting member 231 can be used to adjust the position of the adjacent first limiting members 210a along the second direction F2, so that the first limiting member 210a can be moved along the second direction F2. In this way, it is convenient to adjust the distance between the two first limiting members 210a along the second direction F2 according to the size of the battery cell along the second direction F2, so that the injection jig 10 can be suitable for battery cells of different sizes, and it is also convenient to place or remove the battery cell in the accommodating cavity R.

[0074] In some other embodiments, the glue injection jig 10 also includes a second fixing member 222 and a second adjusting member 232. Along the third direction F3, the second fixing member 222 is arranged on a side of a second limiting member 210b away from another second limiting member 210b, and the second adjusting member 232 is arranged on the second fixing member 222 and is connected to the adjacent second limiting member 210b to drive the adjacent second limiting member 210b to move along the third direction F3.

[0075] The second fixing member 222 is a component used to install or fix the second adjusting member 232 .

[0076] The second adjusting member 232 is a component used to adjust the position of the adjacent second limiting member 210 b along the third direction F3 . For example, the second adjusting member 232 may be a bolt.

[0077] In this way, the second adjusting member 232 can be used to adjust the position of the adjacent second limiting member 210b along the third direction F3, so that the second limiting member 210b can be moved along the third direction F3. In this way, it is convenient to adjust the distance between the two second limiting members 210b along the third direction F3 according to the size of the battery cell along the third direction F3, so that the injection fixture 10 can be suitable for battery cells of different sizes, and it is also convenient to place or remove the battery cell in the accommodating cavity R.

[0078] In some other embodiments, the glue injection jig 10 further includes the first fixing member 221 , the first adjusting member 231 , the second fixing member 222 and the second adjusting member 232 .

[0079] In this way, the distance between the two first limiting members 210a along the second direction F2 can be adjusted according to the size of the battery cell along the second direction F2, and the distance between the two second limiting members 210b along the third direction F3 can also be adjusted according to the size of the battery cell along the third direction F3, so that the injection jig 10 can be suitable for battery cells of different sizes and is also convenient for placing or removing the battery cells in the accommodating cavity R.

[0080] In some embodiments, the first limit member 210a is a first limit plate, the second limit member 210b is a second limit plate, the dimension of the first limit member 210a along the longitudinal direction of the first limit member 210a is L1, the dimension of the second limit member 210b along the longitudinal direction of the second limit member 210b is L2, and L1 is not equal to L2.

[0081] In this way, the accommodating cavity R surrounded by the first limiting member 210a, the second limiting member 210b, the first pressing member 110 and the second pressing member 120 can be more suitable for the square battery cell, making it easier to use the injection fixture 10 to inject glue into the square battery cell.

[0082] In some embodiments, at least one of the first press member 110 and the second press member 120 is movable along the first direction F1 .

[0083] Alternatively, one of the first pressing member 110 and the second pressing member 120 may be movable along the first direction F1 ; alternatively, both the first pressing member 110 and the second pressing member 120 may be movable along the first direction F1 .

[0084] In this way, the distance between the first pressing member 110 and the second pressing member 120 along the first direction F1 can be adjusted according to the size of the battery cell along the first direction F1, so that the injection fixture 10 can be suitable for battery cells of different sizes and is also convenient for placing or removing the battery cell from the accommodating cavity R.

[0085] In some embodiments, the glue injection jig 10 also includes a third fixing member 130 and a third adjusting member 140. Along the first direction F1, the third fixing member 130 is arranged on the side of the first pressing member 110 away from the second pressing member 120. The third adjusting member 140 is arranged on the third fixing member 130 and is connected to the side of the first pressing member 110 away from the second pressing member 120 to drive the first pressing member 110 to move along the first direction.

[0086] The third fixing member 130 is a component used to fix or install the third adjusting member 140 .

[0087] The third adjusting member 140 is a component for adjusting the position of the first holding member 110 along the first direction F1. The third adjusting member 140 is a bolt. In this way, it is convenient to use an electric screwdriver to tighten the bolt and to set a suitable torque on the electric screwdriver according to the pressure applied by the third adjusting member 140 to the first holding member 110.

[0088] The first pressing member 110 can be driven to move along the first direction F1 by the third adjusting member 140, thereby adjusting the position of the first pressing member 110 along the first direction F1, and then the distance between the first pressing member 110 and the second pressing member 120 along the first direction F1 can be adjusted according to the size of the battery cell along the first direction F1, so that the glue injection jig 10 can be suitable for battery cells of different sizes, and it is also convenient to place or remove the battery cell in the accommodating cavity R.

[0089] In some embodiments, the glue injection jig 10 further includes a positioning member 150 , which is movably connected to the third fixing member 130 along the first direction F1 and abuts against a side of the second pressing member 120 facing the first pressing member 110 along the first direction F1.

[0090] For example, the positioning member 150 is a bolt, and the positioning member 150 is threadedly connected to the third fixing member 130 .

[0091] On the one hand, the position of the first pressing member 110 along the first direction F1 can be adjusted as needed to facilitate the placement of the battery cell in the accommodating cavity R; on the other hand, after the battery cell is placed in the accommodating cavity R, the positioning member 150 can be used to improve the clamping stability between the first pressing member 110 and the second pressing member 120, so that the battery cell can be more stably fixed in the accommodating cavity R, which facilitates better glue injection operations on the battery cell.

[0092] In this embodiment, the glue injection jig 10 also includes a plurality of third adjusting members 140 and a plurality of positioning members 150. The plurality of third adjusting members 140 are arranged at intervals around an axis parallel to the first direction F1, and the plurality of positioning members 150 are arranged at intervals around the plurality of third adjusting members 140, so as to facilitate the connection of the inner third adjusting members 140 to the first pressing member 110, and also facilitate the outer positioning members 150 to abut against the side of the second pressing member 120 toward the first pressing member 110 along the first direction F1.

[0093] In some embodiments, the glue injection jig 10 also includes a hand-held portion 160 and a connecting member 170, the hand-held portion 160 is connected to the side of the third fixing member 130 away from the first pressing member 110, the connecting member 170 is connected between the third fixing member 130 and the second pressing member 120 along the first direction F1, and the above-mentioned first fixing member 221 and the second fixing member 222 are respectively arranged on the side of the second pressing member 120 facing the first pressing member 110.

[0094] In this way, it is convenient to hold the handheld portion 160 to move the glue injection jig 10 , thereby improving the convenience of using the glue injection jig 10 .

[0095] In some embodiments, the third adjusting member 140 includes a plurality of bolts, and the total pressure applied by the plurality of bolts to the first holding member 110 is P1, wherein 3 MPa≤P1≤5 MPa.

[0096] The total pressure applied by multiple bolts to the first pressing member 110 is set within a suitable range, for example, P1 is set within the range of 3Mpa≤P1≤5Mpa. This is beneficial for using the first pressing member 110 to apply sufficient pressure to the battery cell without causing damage to the battery cell.

[0097] The total pressure applied by multiple bolts to the first holding member 110 can be evenly distributed to calculate the partial pressure applied by each bolt to the first holding member 110, and then the torque that needs to be set for the electric screwdriver can be calculated based on the partial pressure.

[0098] In some embodiments, a heating element 300 is disposed on at least one of the first pressing element 110 , the second pressing element 120 , and the limiting element 210 .

[0099] The heating member 300 is a component capable of heating at least one of the first pressing member 110 , the second pressing member 120 and the limiting member 210 .

[0100] The heating element 300 may include a heating wire or the like.

[0101] The first pressing member 110, the second pressing member 120 and the stopper 210 may be provided with a heating member 300 respectively; or one of the first pressing member 110, the second pressing member 120 and the stopper 210 may be provided with a heating member 300; or two of the first pressing member 110, the second pressing member 120 and the stopper 210 may be provided with a heating member 300. For example, the heating member 300 is provided on a side of the second pressing member 120 away from the first pressing member 110.

[0102] In this way, the heating element can be used to heat at least one of the first pressing member 110, the second pressing member 120 and the limiting member 210, and then heat the glue injection jig 10, so as to realize the hot pressing and clamping operation of the battery cell. After the glue injection is completed, the heating element 300 can stop heating and the glue injection jig 10 can be cooled so that the electrolyte glue in the accommodating cavity R can be solidified and the battery cell after the glue injection can be demolded.

[0103] In some embodiments, at least one of the first pressing member 110 , the second pressing member 120 and the limiting member 210 is provided with an exhaust port P communicating with the accommodating chamber R.

[0104] Before injecting glue (such as electrolyte glue) into the receiving cavity R through the glue injection port J, the receiving cavity R can be evacuated using the exhaust port P to facilitate the glue injection operation in a vacuum environment, which can better improve the gap filling effect of the battery cell.

[0105] After injecting glue (such as electrolyte glue) into the accommodating cavity R through the glue injection port J, the exhaust port P can be used to exhaust gas, which can reduce the probability of air entrapment in the injected electrolyte glue and better improve the gap filling effect of the battery cell.

[0106] In some embodiments, please combine Figure 4 and Figure 5 The exhaust port P is arranged at the top of the cavity wall of the accommodating cavity R.

[0107] Since the exhaust port P is arranged at the top of the cavity wall of the accommodating cavity R, during the process of injecting glue (such as electrolyte glue) into the accommodating cavity R through the glue injection port J, the bubbles can move upward driven by the injection power of the glue, and can be well discharged through the exhaust port P at the top, thereby reducing the probability of trapped air in the injected electrolyte glue, and better improving the gap filling effect of the battery cell.

[0108] In some embodiments, the glue injection port J is disposed at the bottom of the cavity wall of the accommodating cavity R (which can be combined with Figure 5 to understand).

[0109] Since the glue injection port J is provided at the bottom of the cavity wall of the accommodation cavity R, during the process of injecting glue (such as electrolyte glue) into the accommodation cavity R through the glue injection port J, the liquid level of the glue can gradually rise, facilitating the better upward movement of the gas in the glue driven by the injection power of the glue, thereby reducing the probability of air entrapment in the injected electrolyte glue and improving the void filling effect of the battery cell better.

[0110] In some embodiments, the cavity wall of the accommodation cavity R includes a first diagonal part R1 and a second diagonal part R2 arranged oppositely along the diagonal direction F d The first diagonal part R1 is located at the bottom of the cavity wall of the accommodation cavity R, the second diagonal part R2 is located at the top of the cavity wall of the accommodation cavity R, the glue injection port J is provided at the first diagonal part R1, and the exhaust port P is provided at the second diagonal part R2. The first direction F1 intersects with the diagonal direction.

[0111] In order to distinguish from the first direction F1, the second direction F2, and the third direction F3, in the specification drawings, the diagonal direction F d is correspondingly subscripted with the first letter of the pinyin of "dui" in the diagonal direction, and the gravity direction F Z is correspondingly subscripted with the first letter of the pinyin of "zhong" in the gravity direction.

[0112] Specifically, the first direction F1 intersects with the diagonal direction and the gravity direction of the glue injection jig 10 respectively. Taking the base 410 of the glue injection jig 10 arranged on a horizontal plane as an example, at this time, the gravity direction F Z of the glue injection jig 10 is the vertical direction (as Figure 5 shown).

[0113] The diagonal direction F d is parallel to the following first pressing surface 111 and is respectively arranged at an angle with the second direction F2 and the third direction F3. Exemplarily, the cross-section of the accommodation cavity R parallel to the first pressing surface 111 is rectangular, and the diagonal direction F d is parallel to one of the diagonals of the rectangle.

[0114] In this way, the first diagonal part R1 and the second diagonal part R2 can respectively form a lower part and a higher part, and the distance between the first diagonal part R1 and the second diagonal part R2 is larger (the diagonal is longer). Then, during the process of injecting glue (such as electrolyte glue) into the accommodation cavity R through the glue injection port J, the glue can rise more slowly from the lower part, thereby driving the bubbles in the glue to rise slowly, making the bubbles in the glue easier to discharge (can be discharged from the exhaust port P at the top). Therefore, the probability of air entrapment in the injected electrolyte glue can be greatly reduced, the void filling effect of the battery cell can be improved better, which is beneficial to forming a relatively dense solid electrolyte in the battery cell, thereby solving the problem that the solid battery is prone to short circuit and also improving the shear fracture problem after static pressure well.

[0115] In some embodiments, the glue injection jig further includes a base 410, the second pressing member 120 is disposed on the base 410, and the stopper 210 is disposed at an acute angle with the target plane (which can be combined with Figure 5 ), wherein the target plane is perpendicular to the thickness direction of the base 410.

[0116] In this embodiment, the thickness direction of the base 410 is parallel to the gravity direction of the glue injection jig 10 .

[0117] The first direction F1 may be arranged to intersect with the gravity direction of the glue injection jig 10. The first direction F1 may be perpendicular to the gravity direction of the glue injection jig 10 (which may be combined with Figure 4 It can also be that the first direction F1 is set at an acute angle to the gravity direction of the injection fixture 10 (which can be combined with Figure 6 to understand).

[0118] Since the limit member 210 is arranged at an acute angle with the target plane, and since the target plane is perpendicular to the thickness direction of the base 410, the glue injection jig 10 can be placed in an oblique state, and then in the process of injecting glue (such as electrolyte glue) into the accommodating cavity R through the glue injection port J, the glue can rise more slowly from a low place, so that the bubbles in the glue can be more easily discharged through the exhaust port P, thereby greatly reducing the probability of air entrapment in the injected electrolyte glue, thereby better improving the gap filling effect of the battery cell, and is conducive to forming a denser solid electrolyte in the battery cell, thereby solving the problem of short circuit in solid-state batteries, and also greatly improving the shear fracture problem after static pressure.

[0119] In some embodiments, the angle between one of the limit members 210 and the target plane is ɑ, and ɑ satisfies the following condition: 30°≤ɑ≤60°.

[0120] Illustratively, α is 30°, 45° or 60°.

[0121] Setting ɑ within an appropriate range is beneficial for making the distance between the diagonal points on one side and the diagonal points on the other side of the accommodating cavity R sufficiently large, thereby helping to reduce the probability of air entrapment in the injected electrolyte gel, thereby better improving the gap filling effect of the battery cell, and helping to form a denser solid electrolyte in the battery cell, thereby solving the problem of short circuits in solid-state batteries, and also greatly improving the shear fracture problem after static pressure.

[0122] In some embodiments, the first pressing member 110 has a first pressing surface 111 arranged opposite to the second pressing member 120 along the first direction F1, and the first pressing surface 111 is arranged at an angle β with the thickness direction of the base 410, wherein β satisfies the following condition: 0°<β<90°.

[0123] In this embodiment, the thickness direction of the base 410 is parallel to the gravity direction F of the injection fixture 10. Z Therefore, the gravity direction F of the first pressing surface 111 and the injection fixture 10 is Z The angle β is set between them (such as Figure 6 as shown).

[0124] In the process of injecting glue (such as electrolyte glue) into the accommodating cavity R through the glue injection port J, the closer the liquid level of the glue is to the top of the accommodating cavity R, the greater the amount of glue. Compared with the first holding surface 111 being perpendicular to the horizontal plane, the first holding surface 111 is arranged at an acute angle to the thickness direction of the base 410, so that the liquid level of the glue in the accommodating cavity R can be in a non-horizontal state. In this way, even in the case of a large amount of glue, the bubbles can rise along the liquid level of the glue under the driving force of the injection of the glue and be discharged through the exhaust port P on the top, which is beneficial to reduce the probability of trapped air in the injected electrolyte glue, and thus can better improve the gap filling effect of the battery cell, which is beneficial to form a denser solid electrolyte in the battery cell, thereby solving the problem of short circuit in solid-state batteries, and can also greatly improve the shear fracture problem after static pressure.

[0125] In this embodiment, 0°<β≤45°.

[0126] Illustratively, β is 5°, 10°, 15°, 20°, 25°, 30° or 45°.

[0127] By setting the angle between the first holding surface 111 and the thickness direction of the base 410 within a suitable range, the liquid surface of the glue in the accommodating cavity R can be made non-horizontal, and the bubbles have enough time to climb upward on the liquid surface of the glue, thereby greatly reducing the probability of air entrapment in the injected electrolyte glue, thereby better improving the gap filling effect of the battery cell, and facilitating the formation of a denser solid electrolyte in the battery cell, thereby solving the problem of short circuits in solid-state batteries, and also greatly improving the shear fracture problem after static pressure.

[0128] In some embodiments, the glue injection jig 10 further includes a base 410 and a mounting seat 430 disposed on the base 410 , and the mounting seat 430 is used to clamp the second holding member 120 .

[0129] The mounting base 430 may be directly or indirectly disposed on the base 410. For example, the mounting base 430 is disposed on the base 410 through the support frame 420.

[0130] In this way, the first pressing member 110 , the second pressing member 120 and at least one limiting member 210 can be installed on the base 410 , thereby facilitating the overall movement of the glue injection fixture 10 .

[0131] In this embodiment, the mounting seat 430 includes a clamping portion 431 and a seat body 432. The clamping portion 431 is detachably connected to the base 410 through the seat body 432. The clamping portion 431 is used to clamp the second pressing member 120. The clamping portion 431 has a bearing surface 4311 arranged opposite to the side wall of the second pressing member 120, and the angle between the bearing surface 4311 and the target plane is ɑ.

[0132] In this way, a suitable mounting seat 430 can be selected according to the required angle so that the angle between the limiting member 210 and the target plane is a suitable angle.

[0133] In some embodiments, the stopper 210 is arranged at an acute angle to the target plane, and the first pressing surface 111 is aligned with the gravity direction F of the injection fixture 10. Z The angle β is set between them.

[0134] In this way, in the process of injecting glue (such as electrolyte glue) into the containing cavity R through the glue injection port J, on the one hand, the glue can rise more slowly from a low place, and the liquid surface area of ​​the glue in the containing cavity R shows a trend of gradually increasing and then gradually decreasing, so that the bubbles in the glue can be more easily discharged through the exhaust port P; on the other hand, the liquid surface of the glue in the containing cavity R is in a non-horizontal state, which is convenient for the bubbles to climb upward along the liquid surface of the glue, and also allows the bubbles in the glue to be more easily discharged through the exhaust port P; in this way, the probability of trapped air in the injected electrolyte glue can be greatly reduced, thereby better improving the gap filling effect of the battery cell, which is conducive to the formation of a denser solid electrolyte in the battery cell, thereby solving the problem of short circuit in solid-state batteries, and also greatly improving the shear fracture problem after static pressure.

[0135] An embodiment of the present application provides a glue injection device, comprising the glue injection fixture 10 of any of the above embodiments and a glue valve module 20. The glue valve module 20 has a glue outlet C connected to the glue injection port J.

[0136] For example, the glue valve module 20 is a 300cc glue dispensing valve.

[0137] Glue (such as electrolyte glue) can be injected into the glue injection port J of the glue injection fixture 10 through the glue valve module 20, and then the gap between the positive electrode plate and the negative electrode plate of the battery cell can be injected to form a solid electrolyte, so that the gap between the positive electrode plate and the negative electrode plate can be filled more densely with the solid electrolyte, thereby reducing the probability of the positive electrode plate and the negative electrode plate in the solid-state battery contacting each other due to the gap between them, thereby solving the problem of short circuit in the solid-state battery.

[0138] In some embodiments, the glue injection jig 10 may further include a heat preservation tube, one end of which is connected to the glue injection port J, and the other end of which is connected to the glue outlet C. In this way, glue liquid (such as electrolyte glue liquid) at a certain temperature can be injected into the accommodating cavity R through the glue injection port J, which can improve the fluidity of the glue liquid, thereby facilitating the improvement of glue injection efficiency and glue injection effect.

[0139] Of course, the present application is not limited to this. The glue valve module 20 may also have its own insulation tube. For example, the glue valve module 20 includes an insulation tube (not shown in the figure), a glue nozzle 21 connected to the insulation tube, and a glue valve (not shown in the figure) connected between the insulation tube and the glue nozzle 21. The glue outlet C is provided on the glue nozzle 21. On this basis, the glue injection fixture 10 may also include a glue valve mounting component 500. The glue nozzle 21 of the glue valve module 20 may be arranged through the glue valve mounting component 500 so as to inject glue (such as electrolyte glue) into the glue injection port J of the glue injection fixture 10 through the glue valve module 20.

[0140] In some embodiments, the glue injection device further includes a controller, which is electrically connected to the glue valve module 20 to adjust the speed, pressure and / or flow rate of the glue output from the glue outlet C of the glue valve module 20 .

[0141] In this embodiment, the glue valve module 20 also includes a servo motor electrically connected to the controller, and the servo motor is used to output the glue liquid in the insulation tube through the glue nozzle 21. The output of the servo motor can be controlled by the controller, thereby adjusting the speed, pressure and / or flow rate of the glue liquid output from the glue outlet C of the glue valve module 20, so that the glue liquid is injected into the accommodating cavity R at a suitable temperature, speed, pressure and / or flow rate, thereby improving the glue injection effect of the battery cell.

[0142] In some embodiments, the side wall of the accommodating cavity R is provided with an installation channel (not shown in the figure) connected to the accommodating cavity R, and the glue injection fixture 10 also includes a glue injection tube 600, the glue injection port J is provided on the glue injection tube 600, and the glue injection tube 600 is detachably connected to the installation channel.

[0143] For example, the glue injection tube 600 is passed through and clamped in the installation channel.

[0144] The glue valve module 20 can be used to inject glue (such as electrolyte glue) into the accommodating cavity R through the glue injection port J. After the glue injection operation is completed and the glue is cooled, the solidified glue can be pulled apart, and then the glue injection tube 600 can be pulled out, and the solidified solid electrolyte can be left in the battery cell to form a solid-state battery.

[0145] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0146] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A glue injection jig, characterized in that: include: The first pressing member (110) and the second pressing member (120) are arranged opposite to each other and spaced apart along a first direction; At least one limiting member (210) is located between the first pressing member (110) and the second pressing member (120) along the first direction; The first pressing member (110), the second pressing member (120) and the at least one limiting member (210) enclose a receiving cavity (R) for receiving the battery cell; The cavity wall of the accommodating cavity (R) is provided with a glue injection port (J) which is in communication with the accommodating cavity (R); The first pressing member (110) is provided with a cooling water inlet (K1) and a cooling water outlet (K2) that are connected to each other; and / or, the second pressing member (120) is provided with a cooling water inlet (K1) and a cooling water outlet (K2) that are connected to each other; and / or, the limiting member (210) is provided with a cooling water inlet (K1) and a cooling water outlet (K2) that are connected to each other.

2. The glue injection jig according to claim 1, characterized in that: The glue injection jig comprises a plurality of the limiting members (210), and the plurality of limiting members (210) are arranged around an axis parallel to the first direction and are sequentially connected end to end.

3. The glue injection jig according to claim 2, characterized in that: The plurality of limiting members (210) include two first limiting members (210a) arranged opposite to each other and spaced apart along the second direction, and two second limiting members (210b) arranged opposite to each other and spaced apart along the third direction; The first pressing member (110), the second pressing member (120), the two first limiting members (210a) and the two second limiting members (210b) surround the accommodating cavity (R); The first direction, the second direction and the third direction intersect each other.

4. The glue injection jig according to claim 3, characterized in that: At least one of the first limiting members (210a) is capable of moving along the second direction; and / or At least one of the second limiting members (210b) is capable of moving along the third direction.

5. The glue injection jig according to claim 3, characterized in that: The glue injection jig further comprises a first fixing member (221) and a first adjusting member (231); Along the second direction, the first fixing member (221) is arranged on a side of one of the first limiting members (210a) away from another first limiting member (210a); the first adjusting member (231) is arranged on the first fixing member (221) and is connected to an adjacent first limiting member (210a) to drive the adjacent first limiting member (210a) to move along the second direction; and / or The glue injection jig further comprises a second fixing member (222) and a second adjusting member (232); along the third direction, the second fixing member (222) is arranged on a side of one second limiting member (210b) away from another second limiting member (210b); the second adjusting member (232) is arranged on the second fixing member (222) and is connected to an adjacent second limiting member (210b) to drive the adjacent second limiting member (210b) to move along the third direction.

6. The glue injection jig according to any one of claims 1 to 5, characterized in that: At least one of the first pressing member (110) and the second pressing member (120) is movable along the first direction.

7. The glue injection jig according to claim 6, characterized in that: The glue injection jig further comprises a third fixing member (130) and a third adjusting member (140); along the first direction, the third fixing member (130) is arranged on a side of the first pressing member (110) away from the second pressing member (120); The third adjusting member (140) is disposed on the third fixing member (130) and is connected to a side of the first pressing member (110) away from the second pressing member (120) to drive the first pressing member (110) to move along the first direction.

8. The glue injection jig according to claim 7, characterized in that: The third adjusting member (140) comprises a plurality of bolts, and the total pressure applied by the plurality of bolts to the first holding member (110) is P1, wherein 3Mpa≤P1≤5Mpa.

9. The glue injection jig according to any one of claims 1 to 5, characterized in that: A heating element (300) is provided on at least one of the first pressing element (110), the second pressing element (120) and the limiting element (210).

10. The glue injection jig according to any one of claims 1 to 5, characterized in that: At least one of the first pressing member (110), the second pressing member (120) and the limiting member (210) is provided with an exhaust port (P) communicating with the accommodating chamber (R).

11. The glue injection jig according to claim 10, characterized in that: The exhaust port (P) is arranged at the top of the cavity wall of the accommodating cavity (R).

12. The glue injection jig according to any one of claims 1 to 5, characterized in that: The glue injection port (J) is arranged at the bottom of the cavity wall of the accommodating cavity (R).

13. The glue injection jig according to any one of claims 1 to 5, characterized in that: The cavity wall of the accommodating cavity (R) comprises a first diagonal portion (R1) and a second diagonal portion (R2) which are arranged opposite to each other in a diagonal direction, wherein the first diagonal portion (R1) is located at the bottom of the cavity wall of the accommodating cavity (R), and the second diagonal portion (R2) is located at the top of the cavity wall of the accommodating cavity (R); The first direction is arranged to intersect with the diagonal direction; An exhaust port (P) communicating with the accommodating cavity (R) is provided on the cavity wall of the accommodating cavity (R); the glue injection port (J) is provided at the first diagonal portion (R1), and the exhaust port (P) is provided at the second diagonal portion (R2).

14. The glue injection jig according to any one of claims 1 to 5, characterized in that: The glue injection jig further comprises a base (410), and the second pressing member (120) is arranged on the base (410); The limiting member (210) is arranged at an acute angle with the target plane, wherein the target plane is perpendicular to the thickness direction of the base (410).

15. The glue injection jig according to claim 14, characterized in that: The included angle between one of the limiting members (210) and the target plane is ɑ, and ɑ satisfies the following condition: 30°≤ɑ≤60°.

16. The glue injection jig according to any one of claims 1 to 5, characterized in that: The glue injection jig further comprises a base (410), and the second pressing member (120) is arranged on the base (410); The first pressing member (110) has a first pressing surface (111) arranged opposite to the second pressing member (120) along the first direction, and the first pressing surface (111) is arranged at an angle β with the thickness direction of the base (410), wherein β satisfies the following condition: 0°<β<90°.

17. The glue injection jig according to claim 16, characterized in that: 0°＜β≤45°。 18. A glue injection device, characterized in that: include: The glue injection jig according to any one of claims 1 to 17; and A glue valve module, wherein the glue valve module has a glue outlet connected to the glue injection port (J).

19. The glue injection equipment according to claim 18, characterized in that: The glue injection device also includes a controller, which is electrically connected to the glue valve module to adjust the speed, pressure and / or flow rate of the glue output from the glue outlet of the glue valve module.

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