Battery end plate

Abstract

The utility model relates to a battery end plate, which is an injection molding part and comprises an alloy insert component and an insulator formed by injection molding, the insert assembly is configured to be fixed to the insulator when the insulator is subjected to injection molding, the insert assembly comprises an end plate body, and the end plate body is fixed to the lower end of the insulator; the insulator electrically isolates the end plate body from an electrical connection assembly of a battery. The battery end plate is good in insulation effect, the safety performance of the battery is guaranteed, the strength and the heat dissipation performance of the battery end plate are improved, the production efficiency and the product yield are improved, and the weight of the battery end plate can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of power batteries, in particular to a battery end plate. Background Art

[0002] The power battery is one of the core components of new energy vehicles. The power battery includes a box body and multiple battery modules arranged in the box body. Each battery module includes a side plate, an end plate and a battery cell assembly. The left and right sides of the end plate are welded to the side plate to form a frame body, and the battery cell assembly is placed in the frame to form a battery module.

[0003] In the related art, the material of the end plate is usually plastic. Although the insulation effect is good, the heat dissipation performance is poor, which is not conducive to high-rate discharge performance and cannot guarantee the overall recycling performance of the power battery module. In addition, the strength of the plastic end plate is relatively poor, and it is necessary to add concave-convex structures and reinforcing ribs to the end plate to enhance the strength of the end plate, but this will lead to a reduction in the internal space of the battery module frame, thereby reducing the battery volume specific energy. Utility Model Content

[0004] Based on this, the utility model provides a battery end plate, the battery end plate is an injection molded part, and the battery end plate includes an alloy insert component and an insulator formed by injection molding;

[0005] The insert assembly is configured to be fixed to the insulator during injection molding of the insulator, and the insert assembly includes an end plate body, and the end plate body is fixed to the lower end of the insulator;

[0006] The insulator electrically isolates the end plate body from the electrical connection components of the battery.

[0007] Furthermore, a weight-reducing hole penetrating through the end plate body is provided on the end plate body;

[0008] The insert assembly further includes a barrier body, which is fixed between the end plate body and the insulator and is blocked between the weight-reducing hole and the insulator.

[0009] Furthermore, a mounting groove is provided on one side of the insulator, and a mounting hole connected to the mounting groove is provided on the upper end of the insulator;

[0010] The insert component also includes an assembly body arranged in one-to-one correspondence with the mounting holes, the assembly body is embedded in the corresponding mounting hole, and the assembly body is also provided with an assembly hole connected to the mounting groove, and the assembly hole is used to cooperate with the electrical connection component.

[0011] Furthermore, a first convex portion extending along the circumference of the mounting hole is formed on the hole wall of the mounting hole, and a first groove cooperating with the first convex portion is formed on the outer surface of the assembly body, and the first convex portion is confined in the first groove.

[0012] Furthermore, the battery end plate includes two insulators, which are symmetrically arranged about the central axis of the end plate body, and each of the insulators is provided with a mounting groove and a mounting hole.

[0013] Furthermore, a first receiving groove is formed at the upper end of the end plate body and is arranged in a one-to-one correspondence with the insulator, and the insulator includes a first received portion confined in the first receiving groove.

[0014] Furthermore, the battery end plate includes an insulator, the insulator is provided with two mounting grooves, each mounting groove is provided with a mounting hole, the two mounting grooves are symmetrically arranged about the central axis of the end plate body, and the two mounting holes are symmetrically arranged about the central axis of the end plate body.

[0015] Furthermore, a second receiving groove and two third receiving grooves symmetrically arranged with respect to the second receiving groove are formed at the upper end of the end plate body;

[0016] The insulator includes an insulating main part, a second accommodated part formed at the lower end of the insulating main part, and two third accommodated parts formed on both sides of the insulating main part and extending downward, the mounting groove and the mounting hole are opened on the insulating main part, the second accommodated part is confined in the second receiving groove, the two third accommodated parts are arranged in a one-to-one correspondence with the two third receiving grooves, and each of the third accommodated parts is confined in the corresponding third receiving groove.

[0017] Furthermore, the depth of the third receiving groove is greater than the depth of the second receiving groove.

[0018] Furthermore, the end plate body is made of aluminum alloy.

[0019] Compared with the prior art, the beneficial features of the utility model are as follows: the battery end plate comprises an alloy insert assembly and an insulator formed by injection molding, wherein only the insulator is a plastic part, and the material of the end plate body is an alloy, and the insulator electrically isolates the end plate body from the electrical connection assembly of the battery, which not only has a good insulation effect and ensures the safety performance of the battery, but also improves the strength and heat dissipation performance of the battery end plate, and can reduce the thickness of the battery end plate, increase the internal space of the frame of the battery module, thereby effectively increasing the volume energy density of the battery; moreover, the battery end plate is an injection molded part, and the insert assembly is fixed to the insulator when the insulating part is injection molded, and there is no need to install and fix the insulator to the end plate body, which not only improves the production efficiency and product yield, but also further improves the insulation performance and strength of the battery end plate; in addition, the combination of the alloy insert assembly and the insulator formed by injection molding can effectively reduce the weight of the battery end plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the battery end plate of the embodiment of the utility model;

[0021] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the battery end plate shown;

[0022] Figure 3 for Figure 1 The exploded structural diagram of the battery end plate shown;

[0023] Figure 4 for Figure 1 The exploded structural diagram of the battery end plate shown;

[0024] Figure 5 for Figure 1 A schematic diagram of the top view of the battery end plate shown;

[0025] Figure 6 for Figure 5 AA section view;

[0026] Figure 7 This is a schematic diagram of the three-dimensional structure of the battery end plate of the embodiment of the utility model;

[0027] Figure 8 for Figure 7 A schematic diagram of the three-dimensional structure of the battery end plate shown;

[0028] Fig. 9 for Figure 7 The exploded structural diagram of the battery end plate shown;

[0029] Fig.10 for Fig. 9 An enlarged view of the insulator structure in the battery end plate is shown;

[0030] Fig.11 for Fig. 9 An enlarged view of the end plate body structure of the battery end plate shown;

[0031] Fig.12 for Figure 7 The exploded structural diagram of the battery end plate shown;

[0032] Fig.13 for Fig.12 An enlarged view of the insulator structure in the battery end plate is shown;

[0033] Fig.14 for Figure 7 A schematic diagram of the top view of the battery end plate shown;

[0034] Fig.15 for Fig.14 BB cross-sectional view;

[0035] Wherein: 1-insulator (101-mounting groove, 102-mounting hole, 103-first convex part, 104-insulating main part (1041-first surface), 105-first accommodated part (1051-first neck, 1052-first limiting convex part, 1053-second limiting convex part, 1054-second surface), 106-second accommodated part, 107-third accommodated part (1071-second neck, 1072-third limiting convex part, 1073-convex structure, 1074-third convex part, 1075-third surface), 108-second convex part), 2-end Plate body (201-weight reduction hole, 202-sink hole, 203-first receiving groove (2031-first closing portion, 2032-first limiting cavity, 2033-notch), 204-second receiving groove, 205-third receiving groove (2051-second closing portion, 2052-second limiting cavity, 2053-recessed structure, 2054-third groove), 206-second groove, 207-inner surface, 208-outer surface, 209-step surface, 210-limiting groove), 3-barrier body, 4-assembly body (401-assembly hole, 402-first groove). DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0039] Please refer to Figures 1 to 15 The battery end plate of the embodiment of the utility model is an injection molded part, and the battery end plate includes an alloy insert component and an injection-molded insulator 1. The insert component is configured to be fixed to the insulator 1 during injection molding of the insulator 1, and the insert component includes an end plate body 2. The end plate body 2 is fixed to the lower end of the insulator 1. The insulator 1 electrically isolates the end plate body 2 from the electrical connection components of the battery.

[0040] The battery end plate of the utility model embodiment includes an alloy insert component and an insulator 1 formed by injection molding, wherein only the insulator 1 is a plastic part, and the material of the end plate body 2 is an alloy. The insulator 1 electrically isolates the end plate body 2 from the electrical connection component of the battery, which not only has a good insulation effect and ensures the safety performance of the battery, but also improves the strength and heat dissipation performance of the battery end plate, and can reduce the thickness of the battery end plate, increase the internal space of the frame of the battery module, thereby effectively increasing the volume energy density of the battery; moreover, the battery end plate is an injection molded part, and the insert component is fixed to the insulator 1 during the injection molding of the insulating part, and there is no need to install and fix the insulator 1 to the end plate body 2, which not only improves the production efficiency and product yield, but also further improves the insulation performance and strength of the battery end plate; in addition, the combination of the alloy insert component and the insulator 1 formed by injection molding can effectively reduce the weight of the battery end plate, so that the battery end plate can be more suitable for electric vehicles.

[0041] As an example, the material of the end plate body 2 can be aluminum alloy, which is not only light in weight but also has strong impact resistance. It is not easy to be damaged even when subjected to external impact, thus ensuring the safety of the battery. Moreover, the end plate body 2 made of aluminum alloy has extremely high corrosion resistance and oxidation resistance, thereby extending the service life of the battery. In addition, the end plate body 2 made of aluminum alloy can improve the conductivity and heat dissipation performance of the battery, making the current more evenly distributed in the battery, thereby improving the output power and capacity of the battery.

[0042] It is understandable that in other embodiments, the material of the end plate body 2 may also be other alloys, which will not be elaborated here.

[0043] In some preferred embodiments, please refer to Figures 1 to 6 , Fig. 9 , Fig.11 , Fig.12 as well as Fig.15 The end plate body 2 is provided with a weight-reducing hole 201 penetrating the end plate body 2. Please refer to Figure 3 , Figure 4 , Figure 6 , Fig. 9 , Fig.12 and Fig.15 The insert assembly also includes a barrier 3 , which is fixed between the end plate body 2 and the insulator 1 , and blocks between the lightening hole 201 and the insulator 1 .

[0044] In this embodiment, the weight-reducing hole 201 passes through the end plate body 2, that is, the weight-reducing hole 201 is a through hole, which can not only effectively reduce the weight of the end plate body 2, but also facilitate processing. In addition, the insert assembly also includes a barrier 3, which can block the plastic melt during injection molding to prevent the plastic melt from entering the weight-reducing hole 201 of the end plate body 2, thereby reducing the injection molding volume, further reducing the weight of the end plate body 2, and making the battery end plate more suitable for electric vehicles.

[0045] As an example, the barrier 3 may be an aluminum alloy. It is understandable that in other embodiments, the barrier 3 may also be other alloys, which will not be described in detail here.

[0046] For some examples, see Figure 3 , Figure 6 , Fig. 9 , Fig.11 and Fig.15 , wherein at least one of the weight-reducing holes 201 has a countersunk hole 202 at its upper end that is connected to the weight-reducing hole 201. The countersunk hole 202 is used to install the barrier 3, and the countersunk hole 202 is arranged one-to-one with the barrier 3. The aperture of the countersunk hole 202 is larger than the aperture of the weight-reducing hole 201. After the insulator 1 is injection molded, the barrier 3 is restricted in the countersunk hole 202 by the insulator 1.

[0047] It should be noted that, in other embodiments, the weight-reducing hole 201 may also be a blind hole, and the barrier 3 serves as a part of the end plate body 2. That is, the weight-reducing hole 201 does not penetrate the end plate body 2, and the bottom part of the weight-reducing hole 201 serves as the barrier 3, blocking between the insulator 1 and the weight-reducing hole 201.

[0048] In some preferred embodiments, please refer to Figure 2 , Figure 6 , Figure 8 , Fig.12 , Fig.13 and Fig.15A mounting groove 101 is provided on one side of the insulator 1. A mounting hole 102 connected to the mounting groove 101 is also provided on the upper end of the insulator 1. The insert assembly also includes an assembly body 4 arranged in a one-to-one correspondence with the mounting holes 102, the assembly body 4 is embedded in the corresponding mounting hole 102, and an assembly hole 401 connected to the mounting groove 101 is further provided on the assembly body 4, and the assembly hole 401 is used to cooperate with the electrical connection assembly.

[0049] In this embodiment, an assembly body 4 made of alloy material is embedded on the insulator 1 and connected to the electrical connection component. The strength of the assembly body 4 is greater than that of the insulator 1, and can protect the insulator 1. For example, cracking of the assembly position between the insulator 1 and the electrical connection component can be avoided after long-term use.

[0050] As an example, the material of the assembly 4 can be carbon steel, which not only has high strength and hardness, but also can withstand greater loads and forces. It also has good wear resistance and is not easy to deform. In addition, carbon steel has good stability in high temperature environments and can maintain good mechanical properties. Furthermore, the surface of the assembly 4 can also be plated with silver-zinc alloy, which can not only improve the corrosion resistance of the assembly 4, but also enhance the wear resistance, further improving the service life and strength of the battery end plate.

[0051] It is understandable that in other embodiments, the assembly 4 may also be made of other alloys, which will not be described in detail herein.

[0052] In some embodiments, the electrical connection assembly may include a wire, the assembly hole 401 may be suitable for the wire to pass through, and the wire may pass through the assembly hole 401 and the mounting slot 101 .

[0053] It is understandable that in other embodiments, the electrical connection assembly may also include other structures, and the assembly hole 401 may also play other assembly functions. For example, the electrical connection assembly may also include a bus bar, and the assembly hole 401 may be used to install screws fastened to the bus bar, which will not be described in detail here.

[0054] In some more preferred embodiments, please refer to Figure 3 , Figure 4 , Fig. 9 and Fig.12 A first protrusion 103 extending circumferentially of the mounting hole 102 is formed on the hole wall of the mounting hole 102 , and a first groove 402 cooperating with the first protrusion 103 is formed on the outer surface of the assembly body 4 , and the first protrusion 103 is confined in the first groove 402 .

[0055] In the implementation method, please refer to Figure 6 and Fig.15The first protrusion 103 is confined in the first groove 402 , thereby effectively confining the assembly 4 in the insulator 1 . This not only has a simple structure and does not occupy additional assembly space, but also can effectively prevent the assembly 4 from escaping from the insulator 1 .

[0056] In some preferred embodiments, please refer to Figure 1 , Figure 2 , Figure 7 and Figure 8 The structure of the end plate body 2 is arranged symmetrically about the central axis of the end plate body 2, so that the battery structure is more stable.

[0057] As an optional implementation, please refer to Figures 1 to 6 The battery end plate includes two insulators 1, which are arranged symmetrically about the central axis of the end plate body 2, so that the battery structure is more stable. Each insulator 1 is provided with a mounting groove 101 and a mounting hole 102. In other words, each insulator 1 is provided with an assembly 4.

[0058] It should be noted that the functions of the assembly bodies 4 on the two insulators 1 may be the same or different. For example, the assembly holes 401 of the two assembly bodies 4 may be configured as light holes suitable for the wire to pass through, or the assembly hole 401 of one assembly body 4 may be configured as a light hole suitable for the wire to pass through, and the other may be configured as a threaded hole. The configuration can be based on actual needs and will not be described in detail here.

[0059] For some examples, see Figure 1 , Figure 3 , Figure 4 and Figure 6 A first receiving groove 203 corresponding to the insulator 1 is provided at the upper end of the end plate body 2. The insulator 1 includes an insulating main part 104 exposed outside the end plate body 2 and a first received part 105 confined in the first receiving groove 203. The first received part 105 is formed at the lower end of the insulating main part 104. The mounting groove 101 and the mounting hole 102 are provided on the insulating main part 104.

[0060] In this embodiment, please refer to Figure 1 and Figure 6 The first received portion 105 is confined in the first receiving groove 203, thereby effectively fixing the insulator 1 at the upper end of the end plate body 2, effectively preventing the insulator 1 from being separated from the end plate body 2, which not only improves the stability of the battery end plate, but also eliminates the need for additional fastening of the insulator 1 and the end plate body 2, thereby improving production efficiency and preventing the fasteners from affecting the strength and insulation performance of the insulator 1.

[0061] In some more preferred embodiments, please refer to Figure 3The first receiving groove 203 is opened on the upper end surface of the end plate body 2, and the first receiving groove 203 also passes through one side surface of the end plate body 2. During injection molding, the plastic melt can more easily enter the first receiving groove 203 to fill the first receiving groove 203, thereby improving the product yield of the battery end plate.

[0062] In this embodiment, please refer to Figure 3 and Figure 6 The barrier body 3 is disposed between the first received portion 105 and the weight-reducing hole 201. Therefore, the first receiving groove 203, the sinking hole 202 and the weight-reducing hole 201 are sequentially connected from top to bottom. The first receiving groove 203 may include a first closing portion 2031 and a first limiting cavity 2032 from top to bottom. Figure 4 and Figure 6 The first contained portion 105 includes a first neck portion 1051 and a first limiting protrusion 1052. During injection molding, the first limiting protrusion 1052 is formed in the first limiting cavity 2032, the first neck portion 1051 is formed in the first closing portion 2031, and the first limiting protrusion 1052 is raised relative to the first neck portion 1051, so the first limiting protrusion 1052 cannot pass through the first closing portion 2031 upward and escape from the first containing groove 203. In order to prevent the first contained portion 105 from escaping from the first containing groove 203 through the side opening of the first containing groove 203, and to facilitate the installation of the barrier body 3 in the sink hole 202 from top to bottom, please refer to Figure 3 The groove wall of the first closing portion 2031 is provided with a notch 2033 for the barrier 3 to pass through the first receiving groove 203 and be assembled into the sink hole 202. Accordingly, during injection molding, the plastic melt will also form a second limiting protrusion 1053 at the notch 2033, that is, please refer to Figure 4 The first accommodated portion 105 also includes a second limiting protrusion 1053 protruding outward from the first neck 1051. Under the cooperation of the second limiting protrusion 1053 and the notch 2033, the first accommodated portion 105 cannot escape from the side opening of the first receiving groove 203, so that the insulator 1 is firmly fixed on the end plate body 2.

[0063] As an example, please refer to Figures 1 to 6 In the embodiment shown in FIG. 1 , there is a gap between the first surface 1041 of the insulating main portion 104 and the second surface 1054 of the first receiving portion 105. In other words, please refer to Figure 5As shown, the first surface 1041 and the second surface 1054 are not located on the same plane, but the second surface 1054 and the inner surface 207 of the end plate body 2 are located on the same plane. When assembling the battery module, the inner surface 207 of the end plate body 2 can be attached to the battery cell assembly. Therefore, there is a certain gap between the first surface 1041 and the inner surface 207 of the end plate body 2 of the battery cell assembly, which not only makes the battery end plate have better insulation, but also is more conducive to injection molding, thereby improving the product yield of the battery end plate.

[0064] As an optional implementation, please refer to Figures 7 to 15 The battery end plate includes an insulator 1, which has two mounting grooves 101. Each mounting groove 101 has a mounting hole 102. The two mounting grooves 101 are symmetrically arranged about the central axis of the end plate body 2, and the two mounting holes 102 are symmetrically arranged about the central axis of the end plate body 2, so that the battery structure is more stable.

[0065] Specifically, please refer to Figures 7 to 9 , Fig.11 , Fig.12 as well as Fig.15 The upper end of the end plate body 2 is provided with a second receiving groove 204 and two third receiving grooves 205 symmetrically arranged about the second receiving groove 204. Figures 7 to 9 , Fig.10 , Fig.12 , Fig.13 as well as Fig.15 The insulator 1 includes an insulating main part 104 exposed outside the end plate body 2, a second accommodated part 106 formed at the lower end of the insulating main part 104, and two third accommodated parts 107 formed at the lower ends of both sides of the insulating main part 104 and extending downward. The mounting groove 101 and the mounting hole 102 are opened on the insulating main part 104, the second accommodated part 106 is confined in the second receiving groove 204, the two third accommodated parts 107 are arranged in a one-to-one correspondence with the two third receiving grooves 205, and each third accommodated part 107 is confined in the corresponding third receiving groove 205.

[0066] In this embodiment, please refer to Fig.13, not only is a second receiving portion 106 confined in the end plate body 2 formed at the lower end of the insulating main part 104, but two third receiving portions 107 confined in the end plate body 2 are symmetrically formed on both sides near the lower end of the insulating main part 104, so that the connection between the insulator 1 and the end plate body 2 is more secure, and the insulator 1 is further prevented from coming out of the end plate body 2. Moreover, the depth of the second receiving groove 204 is increased in order to make the insulator 1 and the end plate body 2 firmly connected, which may affect the strength of the end plate body 2. Not only is the stability of the battery end plate improved, but there is no need to additionally fasten the insulator 1 and the end plate body 2, which improves production efficiency, and can also prevent the fasteners from affecting the strength and insulation performance of the insulator 1.

[0067] In some more preferred embodiments, please refer to Figures 7 to 9 , Fig.11 and Fig.15 The depth of the third receiving groove 205 is greater than the depth of the second receiving groove 204. Fig.15 It can be seen that the thickness of the third accommodated portion 107 is greater than the thickness of the second accommodated portion 106, that is, the depth of the third accommodated portion 107 embedded in the end plate body 2 is greater than the depth of the second accommodated portion 106 embedded in the end plate body 2, thereby further ensuring that the insulator 1 and the end plate body 2 are firmly fixed while further avoiding affecting the strength of the end plate body 2.

[0068] In some more preferred embodiments, please refer to Fig.11 The second receiving groove 204 is provided on the upper end surface of the end plate body 2, and the second receiving groove 204 is only open at the upper end, thereby further avoiding affecting the strength of the end plate body 2, and because the thickness of the second accommodated portion 106 is relatively thin, during injection molding, the plastic melt can quickly fill the second receiving groove 204 to form the second accommodated portion 106. And because the thickness of the third accommodated portion 107 is relatively thick, in order to facilitate injection molding, the third receiving groove 205 is not only provided on the upper end surface of the end plate body 2, but also the third receiving groove 205 also transversely penetrates the two side surfaces of the end plate body 2, that is, the third receiving groove 205 is open at three ends, thereby facilitating the plastic melt to fill the third receiving groove 205 to form the third accommodated portion 107.

[0069] In this embodiment, please refer to Fig. 9 and Fig.12 The insulator 1 includes a second received portion 106 and two third received portions 107 . Accordingly, there are three barrier bodies 3 in total.

[0070] Specifically, please refer to Fig.15 , one of the barrier bodies 3 is disposed between the second received portion 106 and the weight-reducing hole 201, so the second receiving groove 204, the sinking hole 202 and the weight-reducing hole 201 are sequentially connected from top to bottom, please refer to Fig.11 In order to simplify the structure, the second receiving groove 204 can be integrated with the countersunk hole 202, that is, the second receiving groove 204 is the countersunk hole 202. In order to prevent the second accommodated portion 106 from escaping upward from the second receiving groove 204, a second groove 206 can be opened on the groove wall of the second receiving groove 204. During injection molding, the plastic melt will also enter the second groove 206 to form a second convex portion 108. In other words, the outer periphery of the second accommodated portion 106 is formed with a second convex portion 108 that is confined in the second groove 206, thereby effectively preventing the second accommodated portion 106 from escaping upward from the second receiving groove 204.

[0071] Please refer to Fig.15 The other two barrier bodies 3 are arranged one by one with the third accommodated portion 107, and the barrier body 3 is arranged between the corresponding third accommodated portion 107 and the weight reduction hole 201. Therefore, the third receiving groove 205, the sinking hole 202 and the weight reduction hole 201 are connected in sequence from top to bottom. Please refer to Fig.11 The third receiving groove 205 may include a second closing portion 2051 and a second limiting cavity 2052 from top to bottom. Correspondingly, the third received portion 107 includes a second neck portion 1071 and a third limiting protrusion 1072. During injection molding, the third limiting protrusion 1072 is formed in the second limiting cavity 2052, and the second neck portion 1071 is formed in the second closing portion 2051. Moreover, the third limiting protrusion 1072 is raised relative to the second neck portion 1071, so the third limiting protrusion 1072 cannot pass through the second closing portion 2051 upwards and escape from the third receiving groove 205. In order to further prevent the third received portion 107 from escaping from the side opening of the third receiving groove 205 and to facilitate the installation of the barrier 3 in the countersunk hole 202 from top to bottom, a recessed structure 2053 suitable for the barrier 3 to pass through the third receiving groove 205 and be assembled into the countersunk hole 202 may be provided on one side of the groove wall of the third receiving groove 205. Accordingly, during injection molding, the plastic melt will also form a protruding structure 1073 in the concave structure 2053, that is, the third accommodated portion 107 also includes a protruding structure 1073 extending from the side of the second neck 1071 to the side of the third limiting protrusion 1072, please refer to Fig.13 Under the cooperation of the protruding structure 1073 and the recessed structure 2053 , the third received portion 107 cannot escape from the openings on both sides of the third receiving groove 205 , so that the insulator 1 is firmly fixed on the end plate body 2 .

[0072] Optionally, refer to Fig.11In order to make the third received portion 107 more firmly fixed to the end plate body 2 and prevent the third received portion 107 from moving in the third receiving groove 205, a third groove 2054 extending laterally may be provided on the recessed structure 2053. During injection molding, the plastic melt may also enter the third groove 2054 to form a third convex portion 1074. Please refer to Fig.13 That is to say, a third protrusion 1074 which is confined in the third groove 2054 is formed on the outer periphery of the third accommodated portion 107, thereby effectively preventing the third accommodated portion 107 from moving, making the battery end plate structure more stable.

[0073] As an example, please refer to Figures 7 to 15 In the embodiment shown, there is a gap between the first surface 1041 of the insulating main portion 104 and the third surface 1075 of the third receiving portion 107. Fig.14 As shown, the first surface 1041 and the third surface 1075 are not located on the same plane, but the third surface 1075 and the inner surface 207 of the end plate body 2 are located on the same plane. When assembling the battery module, the inner surface 207 of the end plate body 2 can be attached to the battery cell assembly. Therefore, there is a certain gap between the first surface 1041 and the inner surface 207 of the end plate body 2 of the battery cell assembly, which not only makes the battery end plate have better insulation, but also is more conducive to injection molding, thereby improving the product yield of the battery end plate.

[0074] In some embodiments, the end plate body 2 has an inner surface 207 facing the battery cell assembly and an outer surface 208 opposite to the inner surface 207. The battery end plate and the battery side plate together form a frame, and two battery side plates are symmetrically arranged on the left and right sides of the battery end plate. The battery side plate may include a side plate body and a flange formed at the end of the side plate body. In order to make the connection between the battery end plate and the battery side plate more secure and enable the battery end plate to more effectively fix the battery cell assembly, please refer to Figure 2 and Figure 8 , the left and right sides of the outer surface 208 of the battery end plate are symmetrically provided with step surfaces 209 that fit with the flange, and the left and right side surfaces of the end plate body 2 are also provided with limiting grooves 210 that fit with the side plate body, and the limiting grooves 210 can extend vertically. Correspondingly, a limiting strip that can be limited in the limiting groove 210 is formed on the side plate body, and the surface of the limiting strip is completely in contact with the groove surface of the limiting groove 210, thereby improving the assembly accuracy of the battery end plate and the battery side plate.

[0075] As an example, the battery end plate can also be welded to the battery side plate, so that the connection between the battery end plate and the battery side plate is more secure. It should be noted that the battery end plate and the battery side plate may not be welded together, or the battery end plate and the battery side plate may be fastened in other ways, which are set according to actual needs and are not limited here.

[0076] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above 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.

[0077] The above embodiments only express the preferred implementation of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A battery end plate, characterized in that: The battery end plate is an injection molded part, and the battery end plate includes an alloy insert component and an insulator formed by injection molding; The insert assembly is configured to be fixed to the insulator during injection molding of the insulator, and the insert assembly includes an end plate body, and the end plate body is fixed to the lower end of the insulator; The insulator electrically isolates the end plate body from the electrical connection components of the battery.

2. The battery end plate according to claim 1, characterized in that: The end plate body is provided with a weight-reducing hole penetrating the end plate body; The insert assembly further includes a barrier body, which is fixed between the end plate body and the insulator and is blocked between the weight-reducing hole and the insulator.

3. The battery end plate according to claim 1, characterized in that: A mounting groove is provided on one side of the insulator, and a mounting hole connected to the mounting groove is provided on the upper end of the insulator; The insert component also includes an assembly body arranged in one-to-one correspondence with the mounting holes, the assembly body is embedded in the corresponding mounting hole, and the assembly body is also provided with an assembly hole connected to the mounting groove, and the assembly hole is used to cooperate with the electrical connection component.

4. The battery end plate according to claim 3, characterized in that: A first convex portion extending along the circumference of the mounting hole is formed on the hole wall of the mounting hole, and a first groove cooperating with the first convex portion is formed on the outer surface of the assembly body, and the first convex portion is confined in the first groove.

5. The battery end plate according to claim 3, characterized in that: The battery end plate includes two insulators, which are symmetrically arranged about the central axis of the end plate body, and each of the insulators is provided with a mounting groove and a mounting hole.

6. The battery end plate according to claim 5, characterized in that: The upper end of the end plate body is provided with a first receiving groove which is arranged in a one-to-one correspondence with the insulator, and the insulator includes a first received portion which is confined in the first receiving groove.

7. The battery end plate according to claim 3, characterized in that: The battery end plate includes an insulator, the insulator is provided with two mounting grooves, each mounting groove is provided with a mounting hole, the two mounting grooves are symmetrically arranged about the central axis of the end plate body, and the two mounting holes are symmetrically arranged about the central axis of the end plate body.

8. The battery end plate according to claim 7, characterized in that: A second receiving groove and two third receiving grooves symmetrically arranged with respect to the second receiving groove are formed at the upper end of the end plate body; The insulator includes an insulating main part, a second accommodated part formed at the lower end of the insulating main part, and two third accommodated parts formed on both sides of the insulating main part and extending downward, the mounting groove and the mounting hole are opened on the insulating main part, the second accommodated part is confined in the second receiving groove, the two third accommodated parts are arranged in a one-to-one correspondence with the two third receiving grooves, and each of the third accommodated parts is confined in the corresponding third receiving groove.

9. The battery end plate according to claim 8, characterized in that: The depth of the third receiving groove is greater than the depth of the second receiving groove.

10. The battery end plate according to claim 1, characterized in that: The material of the end plate body is aluminum alloy.

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