Battery pole assembly, single battery and battery module
By designing grooves in the adapter and protrusions in the overmolded parts in the battery terminal assembly, the problem of fit between the overmolded parts and the terminals is solved, ensuring the battery's insulation performance and heat dissipation, and preventing battery short circuits.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-03-10
AI Technical Summary
In battery modules, the rubber coating of the adapter is difficult to fully fit with the terminal post, leading to insulation failure and affecting battery safety.
Design a battery terminal assembly, wherein the second plate of the adapter has a groove, and the rubber-coated part has a protrusion. The protrusion fills the groove and satisfies the proportional relationship of 0.02≤a1/a≤0.2 and 0.2≤b1/b≤0.5 to ensure that the rubber-coated part and the adapter are tightly connected and prevent them from detaching.
This achieves a tight fit between the coated part and the adapter, enhancing the insulation effect, preventing battery short circuits, and without affecting the heat dissipation performance of the adapter.
Smart Images
Figure CN223986681U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of battery components, and particularly discloses a battery pole assembly, a single battery and a battery module. BACKGROUND
[0002] In some battery modules, the poles of the single batteries are respectively connected with busbars through adapters, and the adapters are covered with insulating encapsulating members. However, due to the structural characteristics of the adapters, the encapsulating members are difficult to be fully attached to the adapters, and when the poles are welded with the tabs, the encapsulating members are prone to be separated from the adapters due to the transmission of heat and expansion force, thereby causing insulation failure. CONTENT OF THE UTILITY MODEL
[0003] The application aims to solve at least part of the technical problems mentioned in the above content, and the aim is achieved by the following technical scheme:
[0004] In a first aspect, the application provides a battery pole assembly, which comprises an adapter, a pole and an encapsulating member, the adapter comprises a first plate body and a second plate body connected at a corner, the pole is connected with the first plate body, and the encapsulating member at least covers part of the structure of the adapter; the second plate body has a first end portion away from the first plate body, one of the first end portion and the encapsulating member is provided with a groove, and the other is provided with a protruding portion, the protruding portion is filled in the groove; the maximum length of the second plate body is a, the thickness is b, the length of the protruding portion is a1, and the width is b1, and 0.02<=a1 / a<=0.2, 0.2<=b1 / b<=0.5 are met.
[0005] The technical scheme provided by the application at least has the following technical effects:
[0006] In the application, the adapter is provided with a groove, the encapsulating member is provided with a protruding portion, and the protruding portion is filled in the groove, which has a good limiting effect, so as to ensure that the encapsulating member is closely attached to the adapter, the connection is firm, the encapsulating member is prevented from being separated from the adapter, the insulation effect is affected, and the battery is prevented from being short-circuited; in addition, the length and the width of the protruding portion are moderate relative to the second plate body, that is, 0.02<=a1 / a<=0.2, 0.2<=b1 / b<=0.5 are met, so as to achieve a good connection effect, and the heat dissipation of the adapter during power supply is not affected. BRIEF DESCRIPTION OF DRAWINGS
[0007] In order to better combine the content shown in the drawings of the specification with the content described in the specific embodiments, the drawings of the specification are briefly introduced as follows. It can be understood that the drawings of the specification mentioned below only schematically show the related technical schemes and some embodiments in the technical schemes of the application, and under the premise of not paying creative labor, the person skilled in the art can also make drawings showing other embodiments.
[0008] Specifically, the annotations of the drawings of the specification are as follows:
[0009] Figure 1 A first axonometric schematic view of a battery post assembly according to some embodiments of the present application;
[0010] Figure 2 A second axonometric schematic view of a battery post assembly according to some embodiments of the present application;
[0011] Figure 3 A first partial schematic view of a first plate and a potting according to some embodiments of the present application;
[0012] Figure 4 A second partial schematic view of a first plate and a potting according to some embodiments of the present application.
[0013] Specifically, the annotations of the drawings of the specification are as follows:
[0014] 100, battery post assembly; 110, adapter; 111, first plate; 112, second plate; 1121, recess; 1122, first clamping boss; 1123, second clamping boss; 1124, connection area; 120, post; 130, potting; 131, protrusion; 132, clamping portion; 133, clamping groove. DETAILED DESCRIPTION
[0015] To make the content of the embodiments of the present application clearer, the following will be described with reference to the drawings of the specification. It is to be understood that the following mentioned content is only some embodiments of the present application, and all the embodiments are not exhaustively listed. Therefore, other embodiments obtained based on the following embodiments are within the protection scope of the present application without creative labor.
[0016] It should be understood that the terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the technical solutions. For example, the terms "one", "a", and "said" used herein are not limited to singular forms but include plural forms unless the context clearly indicates otherwise.
[0017] It should be understood that the terms "comprise", "include" and "have" are open terms, which indicate the presence of the stated features but do not exclude additional features. Similarly, the terms "first", "second" and the like used herein merely indicate different characteristics rather than a sequence or order, unless the context clearly indicates otherwise.
[0018] It should be understood that the terms "set", "connected", "mounted" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be directly connected, or indirectly connected through a medium. For those skilled in the art, the specific meaning of the above terms in the text can be understood according to the specific circumstances.
[0019] In addition, in order to facilitate the description, the spatial relative terms will be used to explain the position of one feature relative to another feature, for example, "inner", "outer", "end", "side", "upper", "middle", "lower", "high", "low", "axial", "circumferential", "radial", "horizontal", "vertical", "first direction", "second direction", etc. It can be understood that the spatial relative relationship between two features should include other specific circumstances other than those shown in the drawings.
[0020] The embodiments of the present application will be described below in conjunction with the drawings.
[0021] In the first aspect, with reference to Figure 1 and Figure 3 The embodiments of the present application provide a battery pole assembly 100, which comprises an adapter 110, a pole 120 and a rubber coating 130, the adapter 110 comprises a first plate body 111 and a second plate body 112 connected at the corner, the pole 120 is connected with the first plate body 111, and the rubber coating 130 at least covers part of the structure of the adapter 110; the second plate body 112 has a first end portion away from the first plate body 111, one of the first end portion and the rubber coating 130 is provided with a groove 1121, and the other is provided with a protrusion 131, the protrusion 131 is filled in the groove 1121; the maximum length of the second plate body 112 is a, the thickness is b, the length of the protrusion 131 is a1, and the width is b1, and satisfy 0.02≤a1 / a≤0.2, 0.2≤b1 / b≤0.5.
[0022] In the present embodiment, the adapter 110 is provided with the groove 1121, the rubber coating 130 is provided with the protrusion 131, the protrusion 131 is filled in the groove 1121, which has a good limiting effect, so as to ensure that the rubber coating 130 is closely attached to the adapter 110, the connection is firm, and the rubber coating 130 is prevented from being separated from the adapter 110, which affects the insulation effect and causes the battery short circuit; in addition, the length and the width of the protrusion 131 are moderate relative to the second plate body 112, that is, satisfy 0.02≤a1 / a≤0.2, 0.2≤b1 / b≤0.5, which can not only achieve good connection effect, but also will not affect the heat dissipation of the adapter 110 during power supply.
[0023] In order to more clearly describe the embodiments, as Figure 1 and Figure 2As shown, a rectangular coordinate system is established with the width direction, length direction and thickness direction of the first plate body 111 as the X direction, Y direction and Z direction, respectively, that is, the X direction, Y direction and Z direction are perpendicular to each other. It can be understood that the thickness direction of the second plate body 112 is consistent with the width direction of the first plate body 111, that is, the X direction; the length direction of the second plate body 112 is consistent with the length direction of the first plate body 111, that is, the Y direction; and the height direction of the second plate body 112 is consistent with the thickness direction of the first plate body 111, that is, the Z direction. Further, the length direction of the protruding portion 131 is the Y direction, and the width direction of the protruding portion 131 is the X direction.
[0024] It should be noted that the length of the protruding portion 131 relative to the length of the second plate body 112 should not be too large, that is, a1 / a should not be too large, otherwise the protruding portion 131 will affect the heat dissipation effect of the adapter 110 when powered on; on the contrary, a1 / a should not be too small, otherwise it is difficult to play a limiting role. Therefore, the value of a1 / a should be moderate, for example, a1 / a can take any one value or a range between any two values of 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19 and 0.2. Similarly, the value of b1 / b should also be moderate, for example, b1 / b can take any one value or a range between any two values of 0.2, 0.25, 0.3, 0.35, 0.4, 0.45 and 0.5.
[0025] Optionally, the included angle between the first plate body 111 and the second plate body 112 is 80° to 100°, preferably 90°.
[0026] Optionally, 10mm≤a≤100mm, for example, a can take any one value or a range between any two values of 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm and 100mm; optionally, 1mm≤b≤5mm, for example, b can take any one value or a range between any two values of 1mm, 2mm, 3mm, 4mm and 5mm; optionally, 0.2mm≤a1≤10mm, for example, a1 can take any one value or a range between any two values of 0.2mm, 0.5mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm and 10mm; optionally, 0.2mm≤b1≤2mm, for example, b1 can take any one value or a range between any two values of 0.2mm, 0.5mm, 1mm, 1.5mm and 2mm.
[0027] Specifically, the encapsulating member 130 is connected to the edges of the second plate body 112 at both ends in the length direction, and the first end portion is provided with a groove 1121 or a protrusion 131 at both ends in the length direction thereof.
[0028] In some embodiments, with reference to Figures 1 to 3 , the groove 1121 is provided on the first end portion, the protrusion 131 is provided on the encapsulating member 130, and 0.02≤a1 / a≤0.15, 0.2≤b1 / b≤0.4 are satisfied.
[0029] In the present embodiment, when the groove 1121 is on the second plate body 112, the protrusion thickness of the encapsulating member 130 is large, and the strength is large, so that when 0.02≤a1 / a≤0.15, 0.2≤b1 / b≤0.4 are satisfied, the fixing strength of the encapsulating member 130 and the second plate body 112 can be improved, and the heat dissipation of the second plate body 112 will not be affected.
[0030] In addition, in some embodiments, with reference to Figure 1 or Figure 2 , the groove 1121 is located at the middle position of the first end portion in the width direction thereof; in some embodiments not shown in the drawings, the groove 1121 is located at the edge position of the first end portion in the width direction thereof, which are all preferable embodiments.
[0031] In some embodiments not shown in the drawings, the groove 1121 is provided on the encapsulating member 130, the protrusion 131 is provided on the first end portion, and 0.05≤a1 / a≤0.2, 0.3≤b1 / b≤0.5 are satisfied.
[0032] In the present embodiment, when the groove 1121 is on the encapsulating member 130, the assembly efficiency of the encapsulating member 130 and the second plate body 112 can be improved, and when 0.05≤a1 / a≤0.2, 0.3≤b1 / b≤0.5 are satisfied, the fixing strength of the encapsulating member 130 and the second plate body 112 can also be ensured, and the heat dissipation of the second plate body 112 will not be affected.
[0033] In some embodiments, with reference to Figure 1 and Figure 2 , the first plate body 111 is provided with a through hole, the pole 120 is at least partially located in the through hole and is welded and fixed with the first plate body 111, the area of the through hole accounts for 10% to 40% of the area of the first plate body 111, 0.02≤a1 / a≤0.15, 0.2≤b1 / b≤0.4.
[0034] In the embodiment, when the through-hole area accounts for 10% to 40% of the area of the first plate body 111, the welding strength of the pole column 120 and the first plate body 111 is better, the overcurrent capacity is stronger, but the welding process temperature is larger, so the covering area of the encapsulating member 130 needs to be reduced to improve the heat dissipation of the plate body, that is, 0.02≤a1 / a≤0.15 and 0.2≤b1 / b≤0.4 are met, the fixing strength of the encapsulating member 130 and the second plate body 112 can be ensured, and the heat dissipation of the second plate body 112 is not affected.
[0035] In some embodiments, the pole column 120 is a copper-aluminum composite pole column. It should be noted that the melting point difference between copper and aluminum is large, and the two are not easy to weld. The negative tab in the battery cell is generally a copper tab, and the adapter 110 is generally an aluminum block. The pole column 120 needs to be welded with the tab and the adapter 110 respectively. Therefore, the pole column 120 generally adopts a copper-aluminum composite manner, so that the copper part in the pole column 120 is welded with the tab, and the aluminum part in the pole column 120 is welded with the adapter 110.
[0036] In addition, the pole column 120 can also be a pure aluminum pole column or a pure copper pole column. The pole column 120 can be connected to the adapter 110 and / or the tab in a non-welding manner, or the adapter 110 is a copper-aluminum composite plate, which is also an acceptable embodiment.
[0037] In some embodiments, the edge of the first plate body 111 is covered with the encapsulating member 130, and the encapsulating member 130 connected to the second plate body 112 is an integral structure and meets 0.02≤a1 / a≤0.15 and 0.2≤b1 / b≤0.4.
[0038] In the embodiment, when the encapsulating member 130 at the edge of the first plate body 111 and the encapsulating member 130 at the edge of the second plate body 112 are an integral structure, the fixing strength of the encapsulating member 130 and the adapter 110 is better, and the insulation performance of the edge of the adapter 110 can be improved, that is, 0.02≤a1 / a≤0.15 and 0.2≤b1 / b≤0.4 can ensure the fixing strength of the encapsulating member 130 and the adapter 110, and the heat dissipation of the adapter 110 is not affected.
[0039] In some embodiments, referring to Figure 3 , the first end portion is provided with first clamping bosses 1122 at both ends along the length direction, the first clamping bosses 1122 are close to the grooves 1121, the encapsulating member 130 is provided with a clamping portion 132, and the clamping portion 132 is engaged with the first clamping bosses 1122.
[0040] In the embodiment, the first clamping bosses 1122 on the adapter 110 and the clamping portion 132 of the encapsulating member 130 are clamped and form a first clamping structure, which further enhances the firmness of the connection between the two.
[0041] In some embodiments, referring to Figure 4 The second plate body 112 has a second end connected to the first plate body 111, and the two ends of the second end along the length direction thereof are respectively provided with a second clamping boss 1123. The rubber coating member 130 is provided with a clamping groove 133 which cooperates with the second clamping boss 1123.
[0042] In the present embodiment, the second clamping boss 1123 on the adapter 110 is clamped with the clamping groove 133 of the rubber coating member 130 to form a second clamping structure, further enhancing the firmness of the connection between the two. It should be noted that the first end and the second end of the second plate body 112 are respectively located at the two opposite ends of the second plate body 112 along the Z direction, that is, the first clamping structure and the second clamping structure play a synergistic role at the two ends along the Z direction, so that the connection between the rubber coating member 130 and the adapter 110 is more firm.
[0043] In a second aspect, the embodiments of the present application provide a single battery, which comprises a cell, a shell, and the battery pole assembly 100 of the first aspect. The cell is arranged inside the shell, and the cell has a tab. The battery pole assembly 100 is arranged at least partially outside the shell, and the pole 120 of the battery pole assembly 100 penetrates the shell and is connected with the tab.
[0044] It should be noted that the first plate body 111 of the adapter 110 is provided with at least one through hole for penetrating the pole 120. In order to control the size of the first plate body 111 in the X direction while ensuring the flow-through effect of the pole 120, a plurality of through holes can be provided on the first plate body 111, and the plurality of through holes penetrate the poles 120 of the same polarity. Specifically, in some embodiments, one set of battery pole assemblies 100 can be arranged at each end of the shell along the length direction thereof, and the two sets of battery pole assemblies 100 are respectively provided with positive poles 120 and negative poles 120.
[0045] In a third aspect, the embodiments of the present application provide a battery module, which comprises a battery protection plate, a busbar, and a plurality of single batteries of the second aspect. The adapters 110 of the plurality of single batteries are respectively connected with the busbar, and the busbar is connected with the battery protection plate.
[0046] In some embodiments, referring to Figure 2 The busbar is connected with the second plate body 112 of the adapter 110 and constitutes a connection area 1124. The edges of the two ends of the second plate body 112 along the length direction thereof are covered with the rubber coating member 130. The shortest distance between the rubber coating member 130 and the connection area 1124 at this position is d, and when 2mm≤d≤10mm, 0.04≤a1 / a≤0.2, and 0.3≤b1 / b≤0.5.
[0047] It should be noted that the busbar, also known as a conductive bus, is used to connect multiple individual batteries to a load. Specifically, the busbar is welded to the adapter 110 and applies an expansion force to the adapter 110, affecting the rubber-coated part 130 at one edge of the adapter 110 along the Y direction. Therefore, the closer the connection area 1124 is to the rubber-coated part 130, the greater the impact on the rubber-coated part 130, requiring a more secure connection between the rubber-coated part 130 and the adapter 110; similarly, the farther the connection area 1124 is from the rubber-coated part 130, the smaller the impact on the rubber-coated part 130. Therefore, when 2mm≤d≤10mm, 0.04≤a1 / a≤0.2, 0.3≤b1 / b≤0.5, the fixing strength between the rubber-coated part 130 and the adapter 110 can be guaranteed without affecting the heat dissipation of the adapter 110.
[0048] It should be understood that both the second-sided single cell and the third-sided battery module include the first-sided battery terminal assembly 100. Therefore, both the second-sided single cell and the third-sided battery module have at least all the technical effects of the first-sided battery terminal assembly 100, and their specific technical effects will not be elaborated here.
[0049] In particular, the embodiments of the single cell in the second aspect and the battery module in the third aspect only illustrate the structure related to the improvement points of this application, but do not mean that they do not have other structures. For example, the single cell also includes an internal adapter structure connecting the tab and the terminal 120, and / or the battery module also includes a frame for accommodating multiple single cells, etc. Other structures will not be described in detail here.
[0050] It should be noted that the technical features involved in the different embodiments of this application described above can be combined with each other as long as they do not conflict with each other.
[0051] Furthermore, the term "and / or" in this application should be understood as follows:
[0052] In the first case, the term “and / or” between the first subject and the second subject includes any of the following meanings: (1) only the first subject; (2) only the second subject; and (3) both the first subject and the second subject.
[0053] In the second case, the term "and / or" between the last two of three or more subjects means including at least any one of the subjects. For example, "first subject, second subject and / or third subject" has the same meaning as "first subject and / or second subject and / or third subject", specifically including the following combinations: (1) only the first subject; (2) only the second subject; (3) only the third subject; (4) first subject and second subject and no third subject; (5) first subject and third subject and no second subject; (6) second subject and third subject and no first subject; and (7) first subject, second subject and third subject;
[0054] Furthermore, the character " / " in this application indicates that the objects before and after it are in an "or" relationship.
[0055] Finally, although the embodiments of this application have been described above in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the concept of this application, and such modifications and variations all fall within the scope of protection of this application.
Claims
1. A battery terminal assembly, characterized in that, The battery pole assembly (100) comprises a transition piece (110), a pole (120) and a glue covering piece (130), the transition piece (110) comprises a first plate body (111) and a second plate body (112) connected by a corner, the pole (120) is connected with the first plate body (111), and the glue covering piece (130) covers at least part of the structure of the transition piece (110). The second plate body (112) has a first end portion away from the first plate body (111), one of the first end portion and the glue covering piece (130) is provided with a groove (1121), and the other is provided with a protrusion (131), the protrusion (131) is filled in the groove (1121). The maximum length of the second plate body (112) is a, the thickness is b, the length of the protrusion (131) is a1, the width is b1, and 0.02≤a1 / a≤0.2, 0.2≤b1 / b≤0.
5.
2. The battery post assembly of claim 1, wherein, The groove (1121) is arranged at the first end portion, the protrusion (131) is arranged at the glue covering piece (130), and 0.02≤a1 / a≤0.15, 0.2≤b1 / b≤0.
4.
3. The battery post assembly of claim 1, wherein, The groove (1121) is arranged at the glue covering piece (130), the protrusion (131) is arranged at the first end portion, and 0.05≤a1 / a≤0.2, 0.3≤b1 / b≤0.
5.
4. The battery post assembly of claim 1, wherein, The first plate body (111) is provided with a through hole, the pole (120) is at least partially located in the through hole and is welded and fixed with the first plate body (111), when the area of the through hole accounts for 10% to 40% of the area of the first plate body (111), 0.02≤a1 / a≤0.15, 0.2≤b1 / b≤0.
4.
5. The battery post assembly of claim 1, wherein, The edge of the first plate body (111) is covered with the glue covering piece (130), and the glue covering piece (130) connected to the second plate body (112) is an integral structure, and 0.02≤a1 / a≤0.15, 0.2≤b1 / b≤0.
4.
6. The battery post assembly of any one of claims 1 to 5, wherein, The first end portion is provided with a first clamping boss (1122) at each end along the length direction, the first clamping boss (1122) is close to the groove (1121), the glue covering piece (130) is provided with a clamping portion (132), and the clamping portion (132) is engaged with the first clamping boss (1122).
7. The battery post assembly of claim 6, wherein, The second plate body (112) has a second end portion connected with the first plate body (111), the second end portion is provided with a second clamping boss (1123) at each end along the length direction, the glue covering piece (130) is provided with a clamping groove (133), and the clamping groove (133) is matched with the second clamping boss (1123).
8. A single cell characterized by, The battery pole assembly (100) comprises a transition piece (110), a pole (120) and a glue covering piece (130), the transition piece (110) comprises a first plate body (111) and a second plate body (112) connected by a corner, the pole (120) is connected with the first plate body (111), and the glue covering piece (130) covers at least part of the structure of the transition piece (110). The battery pole assembly (100) comprises a transition piece (110), a pole (120) and a glue covering piece (130), the transition piece (110) comprises a first plate body (111) and a second plate body (112) connected by a corner, the pole (120) is connected with the first plate body (111), and the glue covering piece (130) covers at least part of the structure of the transition piece (110).
9. A battery module, characterized by The battery protection plate, the busbar and a plurality of single batteries according to claim 8 are included, the adapters (110) of the plurality of single batteries are connected with the busbar respectively, and the busbar is connected with the battery protection plate.
10. The battery module of claim 9, wherein, The busbar is connected with the second plate body (112) of the adapter (110) and constitutes a connecting area (1124), the second plate body (112) is coated with the encapsulating member (130) along the edges of both ends in the length direction, the shortest distance between the encapsulating member (130) coated along the edges of both ends in the length direction of the second plate body (112) and the connecting area (1124) is d, and when 2mm≤d≤10mm, 0.04≤a1 / a≤0.2, 0.3≤b1 / b≤0.5 are met.