Battery insulating member, battery cover plate assembly, and battery

Abstract

The application relates to the technical field of batteries, in particular to a battery insulation component, a battery cover plate assembly and a battery. The battery insulation component is formed with a liquid injection groove which protrudes along a first preset direction and towards the side of a pole group, a side wall of the liquid injection groove along a second preset direction is formed with a plurality of layers of auxiliary flow-through notches, the plurality of layers of auxiliary flow-through notches are sequentially arranged along the first preset direction, each layer of the auxiliary flow-through notches comprises at least one auxiliary flow-through notch, and any auxiliary flow-through notch is in communication with the inside and outside of the liquid injection groove. It can be seen that the auxiliary flow-through notches are arranged on the side wall of the liquid injection groove, electrolyte no longer directly hits the battery pole group during the liquid injection process, thereby avoiding damage to the battery pole group, and the plurality of layers of auxiliary flow-through notches also help to improve the exhaust efficiency of a formation process.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery insulating component, a battery cover assembly, and a battery. Background Technology

[0002] Currently, a single battery cell generally consists of the cell, casing, cover plate, and lower plastic layer. The cell is installed inside the casing. The cover plate is assembled with the lower plastic layer and then with the casing, thus sealing the cell inside the casing. The electrode tabs of the electrode assembly are connected to the terminals integrated on the cover plate. The lower plastic layer separates the cell from the metal cover plate, providing insulation and protection. Additionally, the top cover has a liquid injection hole, and the lower plastic layer has a protruding liquid injection groove facing the electrode assembly side. This groove corresponds to and communicates with the injection hole, and the bottom wall of the groove has a guide hole for vacuuming during liquid injection and formation processes. However, often, the protruding groove is used to press the electrode assembly tightly to improve its stability. This results in a tight fit between the bottom of the groove and the electrode assembly, blocking the guide hole at the bottom of the groove and affecting the vacuuming process during liquid injection and formation. Summary of the Invention

[0003] The purpose of this application is to provide a battery insulating component, a battery cover assembly, and a battery, which to a certain extent solves the technical problem in the prior art where, during the manufacturing process of a single cell, the electrode assembly blocks the guide hole at the bottom of the liquid injection groove on the lower plastic, thereby affecting the vacuuming process in liquid injection and formation.

[0004] This application provides a battery insulating member, which has a liquid injection groove protruding along a first preset direction and toward the electrode group side of the battery. The sidewall of the liquid injection groove along a second preset direction has multiple auxiliary flow gaps, and the multiple auxiliary flow gaps are arranged sequentially along the first preset direction. Each layer of auxiliary flow gaps includes at least one auxiliary flow gap, and each auxiliary flow gap is connected to the interior and exterior of the liquid injection groove.

[0005] In the above technical solution, the sidewall of the injection groove with the auxiliary flow notch is a first sidewall, and the first sidewall includes a support portion and a reinforcing portion; wherein, the number of the support portions is at least one, and when the number of the support portions is multiple, the multiple support portions are sequentially spaced along the first preset direction to divide the side space of the injection groove into multiple sub-spaces, and each sub-space is provided with at least one reinforcing portion to divide each sub-space into multiple spaced auxiliary flow notches; the two ends of any support portion along the third preset direction are respectively connected to the opposite side walls of the injection groove;

[0006] The reinforcing portion disposed near the bottom wall of the injection groove is a first layer of reinforcing portion, and the first layer of reinforcing portion is connected to the bottom wall of the injection groove and the adjacent support portion along the first preset direction; the reinforcing portion disposed near the opening end of the injection groove is a last layer of reinforcing portion, and the last layer of reinforcing portion is connected to the side structure of the opening end of the injection groove and the adjacent support portion along the first preset direction; the reinforcing portion located between the first layer of reinforcing portion and the last layer of reinforcing portion along the first preset direction is an intermediate layer of reinforcing portion, and the intermediate layer of reinforcing portion is connected to two adjacent support portions respectively.

[0007] In any of the above technical solutions, each layer of the sub-space is further provided with a plurality of the reinforcing parts, and the plurality of reinforcing parts are arranged sequentially at intervals along a third preset direction, so as to divide each layer of the sub-space into a plurality of auxiliary flow gaps arranged sequentially at intervals along the third preset direction.

[0008] In any of the above technical solutions, further, along the first preset direction, at least one of the first layer of reinforcing parts extends along the second preset direction into the interior of the injection groove, and is connected to the second sidewall of the injection groove that is opposite to its first sidewall and the bottom wall of the groove.

[0009] In any of the above technical solutions, further, along the second preset direction, the side of the first layer of reinforcing portion near the inside of the injection groove is arranged along the first preset direction.

[0010] In any of the above technical solutions, further, along the second preset direction, an outer guide slope is formed on the side of the first layer of reinforcing part away from the interior of the injection groove, and one end of the outer guide slope near the bottom wall of the groove is disposed facing the interior of the injection groove relative to its other end.

[0011] In any of the above technical solutions, further, along the first preset direction, in the last layer of reinforcing parts near the opening of the injection groove, each reinforcing part has an inner guide slope formed on one side near the interior of the injection groove, and the end of the inner guide slope near the opening is disposed away from the interior of the injection groove relative to its other end.

[0012] In any of the above technical solutions, the reinforcing part is further arranged along a plane parallel to the first preset direction and the second preset direction; the supporting part is arranged along a plane parallel to the second preset direction and the third preset direction.

[0013] In any of the above technical solutions, further, along the second preset direction, one end of the battery insulating member is formed with the liquid injection groove, and the opposite end of the battery insulating member is formed with a mating groove protruding along the first preset direction and toward the electrode group side, and the opening direction of the mating groove is the same as the opening direction of the liquid injection groove. The liquid injection groove is used to press one end of the electrode group, and the mating groove is used to press the other end of the electrode group. Along the first preset direction, the bottom wall of the mating groove is formed with an auxiliary through hole.

[0014] Along the second preset direction, an electrode lug receiving groove is formed between the injection groove and the mating groove, and the side walls of the injection groove and the mating groove that are close to each other form the opposite side walls of the electrode lug receiving groove. A reinforcing rib is provided in the electrode lug receiving groove, and along the first preset direction, one end of the reinforcing rib near the electrode assembly is flush with the side of one of the support portions near the electrode assembly. At least one of the reinforcing ribs is connected to the reinforcing portion along the second preset direction. Along the third preset direction, at least one side of the electrode lug receiving groove has an avoidance notch.

[0015] In any of the above technical solutions, further, the bottom wall of the injection groove along the first preset direction does not have an injection through hole.

[0016] In any of the above technical solutions, the sidewall of the injection groove with the auxiliary flow notch is inclined, and the bottom end of the sidewall near the bottom wall of the groove faces the interior of the injection groove relative to its top end.

[0017] In any of the above technical solutions, further, along the second preset direction, the auxiliary flow notch is formed on the side wall of the injection groove near the electrode tab of the electrode group; along the second preset direction, a flow guiding space is formed between the side wall of the injection groove near the electrode tab of the electrode group and the electrode tab of the electrode group.

[0018] This application also provides a battery cover assembly, including a cover plate and a battery insulating member as described in any of the above technical solutions. Along the first preset direction, the battery insulating member is installed on the inner side of the cover plate near the electrode assembly of the battery. The cover plate has a liquid injection hole, and the liquid injection groove is correspondingly disposed and connected to the liquid injection hole on the cover plate. Therefore, it possesses all the beneficial technical effects of this battery insulating member, which will not be elaborated further here.

[0019] This application also provides a battery, including a housing, an electrode assembly, a cover plate, and a battery insulating member as described in any of the above technical solutions. The electrode assembly is installed within the housing, and the cover plate is installed at least one open end of the housing along a first preset direction. At least one cover plate is fitted with the battery insulating member, which is positioned close to the electrode assembly. The bottom wall of the liquid injection groove of the battery insulating member presses against the electrode assembly. At least one cover plate has a liquid injection hole, and the corresponding liquid injection groove on the battery insulating member is correspondingly positioned and connected to the liquid injection hole along the first preset direction. Therefore, this battery insulating member possesses all the beneficial technical effects described herein, which will not be elaborated further here.

[0020] Compared with the prior art, the beneficial effects of this application are as follows:

[0021] This application provides a novel battery insulating component with auxiliary flow notches on the sidewalls of its electrolyte injection groove. During the electrolyte injection process, the electrolyte no longer directly flows into the battery electrode assembly, thus avoiding damage to the battery electrode assembly. Furthermore, due to the presence of multiple auxiliary flow notches, the electrolyte can be discharged sequentially from the multiple auxiliary flow notches at different heights according to the increase in flow rate, avoiding the huge impact on the electrode assembly when discharged entirely from a single auxiliary flow notch, thereby protecting the electrode assembly. Moreover, the aforementioned multiple auxiliary flow notches also help improve the venting efficiency of processes such as formation. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the battery insulating component provided in the embodiments of this application;

[0024] Figure 2 for Figure 1 A partially enlarged structural diagram;

[0025] Figure 3 This is another structural schematic diagram of the battery insulating component provided in the embodiments of this application;

[0026] Figure 4 for Figure 3 A partially enlarged structural diagram;

[0027] Figure 5 Another structural schematic diagram of the battery insulating component provided in the embodiments of this application;

[0028] Figure 6 for Figure 5 A sectional view along section AA;

[0029] Figure 7 This is a schematic diagram of the structure of the battery cover assembly provided in an embodiment of this application;

[0030] Figure 8 This is another structural schematic diagram of the battery cover assembly provided in an embodiment of this application;

[0031] Figure 9 An exploded view of a battery provided in an embodiment of this application;

[0032] Figure 10 for Figure 9 A partially enlarged structural diagram;

[0033] Figure 11 Another structural schematic diagram of the battery cover assembly provided in the embodiments of this application;

[0034] Figure 12 for Figure 11 A sectional view along section BB;

[0035] Figure 13 for Figure 12 A partially enlarged structural diagram.

[0036] Figure label:

[0037] 1-Battery insulating component, 11-Injection groove, 111-Support part, 112-Reinforcing part, 1121-First layer reinforcing part, 1122-Last layer reinforcing part, 113-First layer auxiliary flow notch, 114-Second layer auxiliary flow notch, 115-Auxiliary flow notch, 116-Inner guide slope, 117-Outer guide slope, 118-First side, 119-First sidewall, 120-Gate bottom wall, 122-Second sidewall, 12-Matching groove, 121-Auxiliary through hole, 13-Electrode receiving groove, 131-Avoidance notch, 14-Reinforcing rib, 2-Cover plate, 21-Injection hole, 20-Electrode group, 201-Electrode, 30-Mylar membrane, 40-Shell, 50-Flow guiding space, 60-First cover plate, 70-Second cover plate, a-First preset direction, b-Second preset direction, c-Third preset direction. Detailed Implementation

[0038] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0039] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0040] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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 orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] The following reference Figures 1 to 13 This application describes a battery insulating member, a battery cover assembly, and a battery according to some embodiments.

[0044] See Figures 1 to 13 As shown, an embodiment of this application provides a battery insulating member 1. The battery insulating member 1 has a liquid injection groove 11 protruding along a first preset direction a and toward the electrode group 20. The sidewall of the liquid injection groove 11 along a second preset direction b has multiple auxiliary flow gaps 115. The multiple auxiliary flow gaps 115 are arranged sequentially along the first preset direction a. Each auxiliary flow gap 115 includes at least one auxiliary flow gap 115. Each auxiliary flow gap 115 is connected to the interior and exterior of the liquid injection groove 11.

[0045] As can be seen from the structure described above, the battery insulating component 1 provided in this application has multiple auxiliary flow gaps 115 on the side wall of the liquid injection groove 11. During the liquid injection process, the electrolyte preferentially flows out from the first auxiliary flow gap 113 near the electrode assembly 20. When the flow rate is large, the electrolyte flows out from the second auxiliary flow gap 114. The electrolyte flows out along the multiple auxiliary flow gaps 115 in this order, which improves the liquid injection efficiency. Moreover, the sequential flow of the electrolyte avoids generating a huge impact on the electrode assembly 20 and other structures. Similarly, when negative pressure is required in processes such as formation, the gas is first discharged from the first auxiliary flow gap 113 into the liquid injection groove 11, and finally discharged from the liquid injection hole 21. When the flow rate is large, the gas flows out from the second auxiliary flow gap 114. The gas flows out along the multiple auxiliary flow gaps 115 in this order, which improves the exhaust efficiency.

[0046] As can be seen, this application provides a novel battery insulating component 1, in which an auxiliary flow notch 115 is provided on the side wall of its electrolyte injection groove 11. During the electrolyte injection process, the electrolyte no longer directly flows into the battery electrode assembly 20, thereby avoiding damage to the battery electrode assembly 20. Moreover, due to the provision of multiple auxiliary flow notches 115, the electrolyte can be discharged sequentially from the multiple auxiliary flow notches 115 at different heights according to the increase in flow rate, avoiding the huge impact on the electrode assembly 20 when it is completely discharged from a single auxiliary flow notch 115, thus protecting the electrode assembly 20. Furthermore, the aforementioned multiple auxiliary flow notches 115 also help improve the venting efficiency of processes such as formation.

[0047] Further, preferably, such as Figure 1 As shown, the first preset direction a is the thickness direction of the battery insulating member 1, and preferably, the thickness direction of the battery insulating member 1, the thickness direction of the cover plate 2, the length direction of the electrode group 20 and the length direction of the shell 40 are all the same, but of course, it is not limited to this.

[0048] Further, preferably, such as Figure 1 As shown, the second preset direction b is the length direction of the battery insulating member 1, and preferably, the length direction of the battery insulating member 1, the length direction of the cover plate 2, the height direction of the electrode group 20 and the height direction of the housing 40 are all the same, but of course, it is not limited to this.

[0049] Further, preferably, such as Figure 2 and Figure 4 As shown, the side wall of the injection groove 11 along the second preset direction b has two layers of auxiliary flow gaps 115. Of course, it is not limited to this. More than two layers of auxiliary flow gaps 115 can also be formed, such as three layers of auxiliary flow gaps 115 or four layers of auxiliary flow gaps 115, etc., depending on the actual needs.

[0050] Further, preferably, such as Figure 3 and Figure 13 As shown, an auxiliary flow notch 115 is formed on the side wall 119 of the injection groove 11 near the tab 201 of the electrode assembly 20, i.e., the first side wall 119. Except for the side wall near the tab 201, the other side walls of the injection groove 11 are fitted with the side walls of the housing 40, resulting in relatively small gaps and venting space. Therefore, providing an auxiliary flow notch 115 on the side of the injection groove 11 near the tab 201 of the electrode assembly 20 facilitates injection and venting. Of course, this is not the only possibility; auxiliary flow notches 115 can also be provided on other side walls of the injection groove 11, or simultaneously on both the side wall near the tab 201 and other side walls of the injection groove 11.

[0051] Further, preferably, such as Figure 13As shown, along the second preset direction b, a certain gap, i.e., a flow guiding space 50, is formed between the side wall of the injection groove 11 near the electrode tab 201 of the electrode group 20 and the electrode tab 201 of the electrode group 20. This is a characteristic of existing structures in the art and will not be described in detail here. Liquid can be injected or vented through this flow guiding space 50. In addition, it should be noted that since the side wall of the injection groove 11 near the electrode tab 201 of the electrode group 20, i.e., the first side wall 119, is inclined, a certain gap will naturally be formed between it and the electrode tab 201 of the electrode group 20, and it will not block the auxiliary flow opening 115.

[0052] Further, preferably, such as Figure 3 and Figure 4 As shown, the bottom wall 120 of the injection groove 11 along the first preset direction a does not have an injection through hole. This effectively prevents the electrolyte from directly impacting the battery electrode assembly 20 during the injection process, thereby avoiding damage to the battery electrode assembly 20. Of course, this is not the only option; an injection through hole can also be provided on the bottom wall 120 of the injection groove 11 along the first preset direction a, depending on the actual needs.

[0053] In addition, it should be noted that when the battery insulating component 1 provided in this application is used in conjunction with the cover plate 2 having the liquid injection hole 21, preferably, the liquid injection groove 11 on the battery insulating component 1 and the liquid injection hole 21 on the cover plate 2 are corresponding along the first preset direction a. Of course, the battery insulating component 1 provided in this application can also be applied to the cover plate 2 without the liquid injection hole 21, depending on the actual needs.

[0054] In one embodiment of this application, preferably, as shown below, Figure 2 and Figure 4 As shown, the sidewall of the injection groove 11 with the auxiliary flow notch 115 is the first sidewall 119, and the first sidewall 119 includes a support portion 111 and a reinforcing portion 112; wherein, the number of support portions 111 is at least one, and when the number of support portions 111 is multiple, the multiple support portions 111 are arranged sequentially at intervals along the first preset direction a to divide the side space of the injection groove 11 into multiple sub-spaces, and each sub-space is provided with at least one reinforcing portion 112 to divide each sub-space into multiple spaced auxiliary flow notches 115; the two ends of any support portion 111 along the third preset direction c are respectively connected to the opposite sidewalls of the injection groove 11;

[0055] The reinforcing portion provided near the bottom wall 120 of the injection groove is the first reinforcing portion 1121, and the first reinforcing portion 1121 is connected to the bottom wall 120 of the injection groove and the adjacent support portion 111 along the first preset direction a; the reinforcing portion provided near the opening end of the injection groove is the last reinforcing portion 1122, and the last reinforcing portion 1122 is connected to the side structure of the opening end of the injection groove and the adjacent support portion 111 along the first preset direction a; the reinforcing portion located between the first reinforcing portion 1121 and the last reinforcing portion 1122 along the first preset direction a is the intermediate reinforcing portion, and the intermediate reinforcing portion is connected to the two adjacent support portions 111 respectively.

[0056] As can be seen from the structure described above, the sidewall of the injection groove 11 is completely open, and a support part 111 and a reinforcing part 112 are provided in the open space, thereby forming the aforementioned multi-layer auxiliary flow gaps 115 in the open space, so as to realize the sequential injection and venting. In addition, the support part 111 and the reinforcing part 112 can also increase the strength of the side of the injection groove 11, preventing deformation during the process of the injection groove 11 pressing the electrode assembly 20, which helps to ensure the stability of the structure. Furthermore, the reinforcing part 112 can also block the electrode tab 201.

[0057] Furthermore, preferably, the support part 111 and the reinforcing part 112 are an integral structure with high overall strength and easy molding. Of course, this is not the only option.

[0058] It should be noted that in this embodiment, there is only a first layer of reinforcing part 1121 and a last layer of reinforcing part 1122, and no intermediate layer of reinforcing part is provided. Of course, it is not limited to this and may also include an intermediate layer of reinforcing part, depending on the actual needs.

[0059] In one embodiment of this application, preferably, as shown below, Figure 2 and Figure 4 As shown, each layer of space is provided with multiple reinforcing parts 112, and the multiple reinforcing parts 112 are arranged sequentially at intervals along the third preset direction c, so as to divide each layer of space into multiple auxiliary flow gaps 115 arranged sequentially at intervals along the third preset direction c.

[0060] As can be seen from the structure described above, by setting multiple reinforcing parts 112 in each layer, multiple sequentially spaced auxiliary flow gaps 115 can be formed in each layer, realizing uniform liquid drainage or air venting. Of course, it is not limited to setting multiple reinforcing parts 112 in each layer's space; one reinforcing part 112 can also be set in each layer's space, depending on actual needs.

[0061] Furthermore, preferably, the third preset direction c is the width direction of the battery insulating member 1, and preferably, the width direction of the battery insulating member 1, the width direction of the cover plate 2, the width direction of the electrode group 20 and the width direction of the housing 40 are all the same, but of course, it is not limited to this.

[0062] In one embodiment of this application, preferably, as shown below, Figure 2 As shown, along the first preset direction a, at least one of the first layer of reinforcing portions 1121 near the bottom wall 120 of the injection groove 11 extends along the second preset direction b into the interior of the injection groove 11, and is connected to the other side wall of the injection groove 11, namely the second side wall 122 and the bottom wall 120.

[0063] As can be seen from the structure described above, at least one of the multiple reinforcing portions 112 near the bottom wall of the injection groove 11 extends into the interior of the injection groove 11 and connects with the opposite side wall of the injection groove 11 and the bottom wall 120 of the groove, thereby increasing the strength of the bottom wall 120 of the injection groove 11 and preventing the bottom wall 120 of the injection groove 11 from deforming during the pressing of the electrode assembly 20.

[0064] Furthermore, preferably, only one reinforcing part 112 in the first layer of reinforcing parts 1121 extends into the interior of the injection groove 11 along the third predetermined direction c, and is connected to the opposite side wall of the injection groove 11 and the bottom wall 120 of the groove. Of course, it is not limited to this; multiple reinforcing parts 112 can also extend into the interior of the injection groove 11 simultaneously and be connected to the opposite side wall of the injection groove 11 and the bottom wall 120 of the groove, etc., depending on actual needs.

[0065] In one embodiment of this application, preferably, as shown below, Figure 2 As shown, along the second preset direction b, the first side 118 of the first layer reinforcement 1121, which is close to the inside of the injection groove 11, is disposed along the first preset direction a.

[0066] As can be seen from the structure described above, the inner side of each reinforcing part 112 in the first layer of reinforcing part 1121 near the liquid injection groove 11 is arranged along the first preset direction a, such as the vertical direction, to avoid occupying the internal space of the liquid injection groove 11 and to ensure liquid drainage and air venting. Of course, it is not limited to this. The side of the first layer of reinforcing part 1121 near the inside of the liquid injection groove 11 can also be arranged at an angle.

[0067] In one embodiment of this application, preferably, as shown below, Figure 4As shown, along the second preset direction b, an outer guide slope 117 is formed on the side of the first layer reinforcement 1121 away from the inside of the injection groove 11, and one end of the outer guide slope 117 near the bottom wall 120 of the groove is disposed opposite to the other end of the outer guide slope 117 toward the inside of the injection groove 11.

[0068] As can be seen from the structure described above, each reinforcing part 112 in the first layer of reinforcing part 1121 has an outer guide slope 117 formed on its outer side, which plays the role of guiding flow and guiding air, and can also play the role of avoiding the tab 201, thus avoiding damage to the tab 201.

[0069] In one embodiment of this application, preferably, as shown below, Figure 2 As shown, along the first preset direction a, in the last layer of reinforcing part 1122 near the opening of the injection groove 11, an inner guide slope 116 is formed on the side of each reinforcing part 112 near the inner side of the injection groove 11, and the end of the inner guide slope 116 near the opening is disposed away from the interior of the injection groove 11 relative to its other end.

[0070] As can be seen from the structure described above, each reinforcing part 112 in the first layer of reinforcing part 1121 has an inner guide slope 116 formed on its inner side, which serves to guide flow and air.

[0071] In one embodiment of this application, preferably, as shown below, Figure 2 and Figure 4 As shown, the reinforcing part 112 is arranged along a plane formed parallel to the first preset direction a and the second preset direction b; the supporting part 111 is arranged along a plane formed parallel to the second preset direction b and the third preset direction c.

[0072] As can be seen from the structure described above, the reinforcing part 112 and the supporting part 111 arranged in the above orientation, and further arranged with more auxiliary flow gaps 115 extending towards the second preset direction b within a limited space, help to improve the liquid injection and venting effect. Of course, the orientation of the reinforcing part 112 and the supporting part 111 is not limited to this, and can be selected according to actual needs.

[0073] In one embodiment of this application, preferably, as shown below, Figure 1 , Figure 3 and Figure 13As shown, along the second preset direction b, one end of the battery insulating member 1 is formed with an injection groove 11, and the opposite end of the battery insulating member 1 is formed with a mating groove 12 protruding along the first preset direction a and toward the electrode assembly 20. The opening direction of the mating groove 12 is the same as the opening direction of the injection groove 11. The injection groove 11 is used to press one end of the electrode assembly 20, and the mating groove 12 is used to press the other end of the electrode assembly 20. Along the first preset direction a, the bottom wall of the mating groove 12 is formed with an auxiliary through hole 121, which serves to assist in injection and venting.

[0074] Along the second preset direction b, the side walls of the injection groove 11 and the mating groove 12 that are close to each other form the opposite side walls of the tab receiving groove 13, and a reinforcing rib 14 is provided in the tab receiving groove 13. Along the first preset direction a, one end of the reinforcing rib 14 near the electrode assembly 20 is flush with one side of the support part 111 near the electrode assembly 20, and at least one of the reinforcing ribs 14 is connected to the reinforcing part 112 along the second preset direction b to improve the overall strength.

[0075] As can be seen from the structure described above, the mating groove 12 and the liquid injection groove 11 are located at both ends of the battery insulating member 1, respectively. In this way, the outer bottom wall of the liquid injection groove 11 and the outer bottom wall of the mating groove 12 can be used to abut against both ends of the electrode assembly 20, thereby pressing both ends of the electrode assembly 20, making the electrode assembly 20 more stable and less prone to shifting. Furthermore, designing the other end of the battery insulating member 1 as a groove structure helps with lightweight design.

[0076] Furthermore, an electrode lug receiving groove 13 is formed between the injection groove 11 and the mating groove 12, and the side walls of the injection groove 11 and the mating groove 12 that are close to each other form the opposite side walls of the electrode lug receiving groove 13. A reinforcing rib 14 is provided within the electrode lug receiving groove 13, which serves to increase strength and to support and limit the electrode lug 201. The end of the reinforcing rib 14 near the electrode assembly 20 is flush with the side of one of the support portions 111 near the electrode assembly 20. When the electrode lug 201 extends close to the support portion 111, the aforementioned structure effectively prevents the protruding support portion 111 from damaging the electrode lug 201. Of course, this is not the only benefit.

[0077] Furthermore, preferably, along the third preset direction c, at least one side of the tab receiving groove 13 is formed with an avoidance notch 131, and the avoidance notch 131 extends along the first preset direction a through the end of the corresponding side wall of the tab receiving groove 13 near the electrode assembly 20. This avoidance notch 131 facilitates the installation of the tab 201 into the tab receiving groove 13 and avoids interference. Of course, it is not limited to this.

[0078] In one embodiment of this application, preferably, as shown below, Figure 3and Figure 13 As shown, the sidewall of the injection groove 11 with the auxiliary flow notch 115 is inclined, and the bottom end of the sidewall near the bottom wall 120 of the groove is positioned towards the inside of the injection groove 11 relative to its top end.

[0079] As can be seen from the structure described above, the sidewall of the injection groove 11 with the auxiliary flow notch 115 in this application is designed to be inclined, thus providing sufficient space to accommodate the support part 111 and the reinforcing part 112, meeting the requirements for side injection and venting. Of course, it is not limited to this; the sidewall of the injection groove 11 with the auxiliary flow notch 115 can also be designed to be vertical along the first preset direction a, depending on the actual needs.

[0080] See Figure 7 and Figure 8 As shown, embodiments of this application also provide a battery cover assembly, including a cover plate 2 and a battery insulating member 1 as described in any of the above embodiments. Along a first preset direction a, the battery insulating member 1 is installed on the inner side of the cover plate 2 near the electrode group 20 of the battery. The cover plate 2 has an injection hole 21, and an injection groove 11 is correspondingly disposed and connected to the injection hole 21 on the cover plate 2. Therefore, it possesses all the beneficial technical effects of the battery insulating member 1, which will not be elaborated further here.

[0081] See Figures 9 to 13 As shown, embodiments of this application also provide a battery, including a housing 40, an electrode assembly 20, a cover plate 2, and a battery insulating member 1 as described in any of the above embodiments. The electrode assembly 20 is installed within the housing 40, and a cover plate 2 is installed at least one open end of the housing 40 along a first preset direction a. At least one cover plate 2 is fitted with a battery insulating member 1, which is positioned close to the electrode assembly 20. The bottom wall 120 of the liquid injection groove 11 of the battery insulating member 1 presses against the electrode assembly 20. At least one cover plate 2 has a liquid injection hole 21, and the corresponding liquid injection groove 11 on the battery insulating member 1 is correspondingly positioned and connected to the liquid injection hole 21 along the first preset direction a. Therefore, it possesses all the beneficial technical effects of the battery insulating member 1, which will not be elaborated further here.

[0082] Furthermore, preferably, openings are formed at both ends of the housing 40 along the first preset direction a, that is, the length direction of the housing 40, and both openings are fitted with cover plates. One of the cover plates, namely the first cover plate 60, is provided with the battery insulating member 1 described in the aforementioned embodiment one, and the other cover plate, namely the second cover plate 70, is provided with other types of insulating members, namely existing lower plastic. The first cover plate 60 is provided with a liquid injection hole 21, which is correspondingly provided with the liquid injection groove 11 of the battery insulating member 1 provided on the first cover plate 60 along the first preset direction a. The second cover plate 70 is provided with an explosion-proof valve.

[0083] Of course, it is not limited to the above. The first cover plate 60 and the second cover plate 70 can also be equipped with the battery insulation component 1 in the aforementioned embodiment. In addition, the liquid injection hole 21 and the explosion-proof valve can also be set on the same cover plate at the same time, depending on the actual needs.

[0084] Furthermore, preferably, the electrode assembly 20 is externally wrapped with a Mylar membrane 30, which is a conventional setting and will not be described in detail here.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery insulating component, characterized in that, The battery insulating member has a liquid injection groove protruding along a first preset direction and toward the electrode group side of the battery. The sidewall of the liquid injection groove along a second preset direction has multiple auxiliary flow gaps. The multiple auxiliary flow gaps are arranged sequentially along the first preset direction. Each layer of auxiliary flow gaps includes at least one auxiliary flow gap. Each auxiliary flow gap is connected to the interior and exterior of the liquid injection groove. The sidewall of the injection groove with the auxiliary flow notch is a first sidewall, and the first sidewall includes a support portion and a reinforcing portion; wherein, the number of the support portions is at least one, and when the number of the support portions is multiple, the multiple support portions are sequentially spaced along the first preset direction to divide the side space of the injection groove into multiple sub-spaces, and each sub-space is provided with at least one reinforcing portion to divide each sub-space into multiple spaced auxiliary flow notches; the two ends of any support portion along the third preset direction are respectively connected to the opposite side walls of the injection groove; The reinforcing portion disposed near the bottom wall of the injection groove is a first layer of reinforcing portion, and the first layer of reinforcing portion is connected to the bottom wall of the injection groove and the adjacent support portion along the first preset direction; the reinforcing portion disposed near the opening end of the injection groove is a last layer of reinforcing portion, and the last layer of reinforcing portion is connected to the side structure of the opening end of the injection groove and the adjacent support portion along the first preset direction; the reinforcing portion located between the first layer of reinforcing portion and the last layer of reinforcing portion along the first preset direction is an intermediate layer of reinforcing portion, and the intermediate layer of reinforcing portion is connected to two adjacent support portions respectively.

2. The battery insulating component according to claim 1, characterized in that, Each layer of the sub-space is provided with a plurality of reinforcing parts, and the plurality of reinforcing parts are arranged sequentially at intervals along a third preset direction, so as to divide each layer of the sub-space into a plurality of auxiliary flow gaps arranged sequentially at intervals along the third preset direction.

3. The battery insulating component according to claim 1, characterized in that, Along the first preset direction, at least one of the first layer of reinforcing parts extends along the second preset direction into the interior of the injection groove, and is connected to the second sidewall of the injection groove, which is opposite to its first sidewall, and the bottom wall of the groove.

4. The battery insulating component according to claim 1, characterized in that, Along the second preset direction, the side of the first layer of reinforcement near the inside of the injection groove is arranged along the first preset direction.

5. The battery insulating component according to claim 1, characterized in that, Along the second preset direction, an outer guide slope is formed on the side of the first layer reinforcement away from the inside of the injection groove, and one end of the outer guide slope near the bottom wall of the groove is positioned towards the inside of the injection groove relative to its other end.

6. The battery insulating component according to claim 1, characterized in that, Along the first preset direction, in the last layer of reinforcing portions near the opening of the injection groove, each reinforcing portion has an inner guide slope formed on one side near the interior of the injection groove, and the end of the inner guide slope near the opening is disposed away from the interior of the injection groove relative to its other end; and / or The reinforcing portion is arranged along a plane parallel to the first and second preset directions; the supporting portion is arranged along a plane parallel to the second and third preset directions; and / or Along the second preset direction, one end of the battery insulating member has the liquid injection groove, and the opposite end of the battery insulating member has a mating groove that protrudes along the first preset direction and toward the electrode assembly side, and the opening direction of the mating groove is the same as the opening direction of the liquid injection groove. The liquid injection groove is used to press one end of the electrode assembly, and the mating groove is used to press the other end of the electrode assembly. Along the first preset direction, the bottom wall of the mating groove has an auxiliary through hole. Along the second preset direction, an electrode lug receiving groove is formed between the injection groove and the mating groove, and the side walls of the injection groove and the mating groove that are close to each other form the opposite side walls of the electrode lug receiving groove. A reinforcing rib is provided in the electrode lug receiving groove, and along the first preset direction, one end of the reinforcing rib near the electrode assembly is flush with the side of one of the support portions near the electrode assembly. At least one of the reinforcing ribs is connected to the reinforcing portion along the second preset direction. Along the third preset direction, at least one side of the electrode lug receiving groove has an avoidance notch.

7. The battery insulating member according to any one of claims 1 to 6, characterized in that, The bottom wall of the injection groove along the first preset direction does not have an injection through hole; and / or The sidewall of the injection groove with the auxiliary flow notch is inclined, and the bottom end of the sidewall near the bottom wall of the groove faces inward relative to its top end towards the interior of the injection groove; and / or Along the second preset direction, the auxiliary flow notch is formed on the side wall of the injection groove near the electrode tab of the electrode assembly; along the second preset direction, a flow guiding space is formed between the side wall of the injection groove near the electrode tab of the electrode assembly and the electrode tab of the electrode assembly.

8. A battery cover assembly, characterized in that, The device includes a cover plate and a battery insulating member as described in any one of claims 1 to 7, wherein the battery insulating member is mounted on the inner side of the cover plate near the electrode assembly of the battery along the first preset direction; the cover plate has an injection hole, and the injection groove is correspondingly disposed and connected to the injection hole on the cover plate.

9. A battery, characterized in that, The device includes a housing, an electrode assembly, a cover plate, and a battery insulating member as described in any one of claims 1 to 7; wherein the electrode assembly is installed inside the housing and the cover plate is installed at least one open end of the housing along the first preset direction, and the battery insulating member is installed on at least one cover plate, and the battery insulating member is disposed near the electrode assembly side, and the bottom wall of the liquid injection groove of the battery insulating member presses against the electrode assembly; at least one cover plate has a liquid injection hole, and the corresponding liquid injection groove on the battery insulating member is disposed correspondingly to and connected to the liquid injection hole along the first preset direction.

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