Battery and electric equipment

Abstract

The utility model relates to the technical field of batteries, and provides a battery and electric equipment. The battery comprises a fixing plate, an electric connecting piece and at least two battery monomers, each battery monomer is provided with an electric connecting end, the fixing plate is provided with a mounting groove for mounting the battery monomers, the electric connecting piece is arranged in the fixing plate, the mounting groove is exposed out of the electric connecting piece, and the electric connecting piece is used for being in contact with the electric connecting end, so that the at least two battery monomers are electrically connected. And the battery monomers do not need to be welded with the electric connecting pieces, so that welding slag can be avoided, and the safety performance of the battery is improved. In addition, temperature rise can be avoided, so that the performance of the single battery is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery and an electrical equipment using the same. Background Art

[0002] A battery (also called a battery module or a battery pack) generally includes a plurality of battery cells, and the plurality of battery cells are usually arranged in parallel, in series or in a hybrid connection. During the assembly process of existing cylindrical batteries, first, a plurality of battery cells are installed on a fixing plate, and then both ends of an electrical connecting member (i.e., a bus bar, a tab, an aluminum sheet, etc.) are respectively welded to the pole columns of two battery cells, so as to realize the electrical connection of the plurality of battery cells. However, high temperature will be generated when the battery cell is welded to the electrical connecting member, which will affect the performance of the battery cell, and the welding slag generated during the welding of the two will bring certain safety risks. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a battery and an electrical equipment using the same, aiming to solve the technical problem of the low safety performance of existing batteries.

[0004] In a first aspect, the present application provides a battery, including a fixing plate, an electrical connecting member and at least two battery cells. Each battery cell has an electrical connection end. The fixing plate is provided with an installation groove for installing the battery cells. The electrical connecting member is arranged in the fixing plate, and the installation groove exposes the electrical connecting member. The electrical connecting member is used to contact the electrical connection end so as to electrically connect at least two battery cells.

[0005] The beneficial effect of the battery provided by the utility model is as follows: In the prior art, a plurality of battery cells need to be welded to an electrical connecting member to form an electrical connection. The high temperature generated during welding will cause gas generation inside the battery cell and will cause certain damage to the pole piece and diaphragm inside the battery cell. In the present application, by arranging the electrical connecting member in the fixing plate, after a plurality of battery cells are installed on the fixing plate, they can directly abut against the electrical connecting member, so that an electrical connection is formed between the plurality of battery cells. Compared with the prior art, the battery cells in the present application do not need to be welded to the electrical connecting member, which can avoid the generation of welding slag and is beneficial to improving the safety performance of the battery. In addition, the temperature rise can also be avoided, thereby ensuring the performance of the battery cell.

[0006] Optionally, the electrical connection end includes a positive terminal and a negative terminal that are located on the same side of the battery cell and are electrically isolated from each other. The electrical connecting member includes a positive connecting member for contacting the positive terminal and a negative connecting member for contacting the negative terminal, and the positive connecting member and the negative connecting member are electrically isolated from each other.

[0007] Optionally, the positive terminal and the negative terminal are coaxially arranged.

[0008] Optionally, the battery cell has a first side and a second side which are oppositely arranged in its own height direction, and the positive terminal and the negative terminal are both located on the first side. Among them, compared with the surface of the positive terminal far from the second side, the surface of the negative terminal far from the second side is closer to the second side.

[0009] Optionally, the installation groove is formed in the bottom surface of the fixing plate, and the inner wall surface of the installation groove far from the bottom surface of the fixing plate exposes the positive connection member.

[0010] Optionally, the inner wall surface of the installation groove far from the bottom surface of the fixing plate exposes the negative connection member.

[0011] Optionally, the positive connection member is exposed in the installation groove, and a first insertion portion is provided on the surface close to the bottom surface of the fixing plate. A positive insertion portion is provided on the surface of the positive terminal in the height direction of the battery cell. Among them, the first insertion portion is adaptively inserted with the positive insertion portion.

[0012] Optionally, the negative connection member is exposed in the installation groove, and a second insertion portion is provided on the surface close to the bottom surface of the fixing plate. A negative insertion portion is provided on the surface of the negative terminal in the height direction of the battery cell. Among them, the second insertion portion is adaptively inserted with the negative insertion portion.

[0013] Optionally, the battery cell is threadedly connected in the installation groove.

[0014] Optionally, the battery cell is adhesively bonded in the installation groove.

[0015] Optionally, the fixing plate is made of an insulating material.

[0016] Optionally, an external thread is provided on the outer surface of the battery cell, and an internal thread adapted to be connected with the external thread is provided on the inner wall of the installation groove.

[0017] Optionally, the external thread includes a plurality of first thread segments and a plurality of second thread segments arranged at intervals along a spiral line. Along the traveling direction of the spiral line, there is at least one second thread segment between two adjacent first thread segments, and the length of the second thread segment is less than the length of the first thread segment.

[0018] In a second aspect, the present application provides an electrical device including the above-mentioned battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1Schematic diagram of the structure of the battery provided by the embodiment of the present utility model;

[0021] Figure 2 Schematic diagram of the structure of the battery cell provided by the embodiment of the present utility model;

[0022] Figure 3 Cross-sectional view of the battery cell provided by the embodiment of the present utility model;

[0023] Figure 4 Cross-sectional view of the battery (after explosion) provided by the embodiment of the present utility model;

[0024] Figure 5 Another schematic diagram of the structure of the battery cell provided by the embodiment of the present utility model.

[0025] Among them, each reference numeral in the figure:

[0026] 100, battery; 10, battery cell; 20, fixing plate;

[0027] 11, electrical connection end; 111, positive terminal;

[0028] 1111, positive electrode plugging part;

[0029] 112, negative terminal; 1121, negative electrode plugging part; 12, external thread;

[0030] 121, first thread section; 122, second thread section; 13, first side;

[0031] 14, second side; 15, insulating part; 21, electrical connection part;

[0032] 211, positive electrode connection part; 2111, first plugging part; 212, negative electrode connection part;

[0033] 2121, second plugging part; 22, installation groove. Detailed implementation mode

[0034] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as limiting the present utility model.

[0035] References to "an embodiment" or "embodiments" throughout this specification mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the phrases "in one embodiment" or "in some embodiments" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0036] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0038] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] Please refer to Figures 1 to 5 , and now the battery 100 and the electrical device in the embodiment of the present utility model will be described. Among them, the height direction of the battery cell 10 is parallel to the up and down direction.

[0040] Please refer to Figure 1 and Figure 2, the battery 100 provided by the present application includes a fixing plate 20, an electrical connector 21, and at least two battery cells 10. Each battery cell 10 has an electrical connection end 11. The fixing plate 20 is provided with an installation groove 22 for installing the battery cells 10. The electrical connector 21 is disposed within the fixing plate 20, and the installation groove 22 exposes the electrical connector 21. The electrical connector 21 is used to contact the electrical connection end 11 so that at least two battery cells 10 are electrically connected. Among them, at least two battery cells 10 can be connected in series, parallel, or in a hybrid connection.

[0041] In the prior art, multiple battery cells need to be welded to the electrical connector 21 to form an electrical connection. The high temperature generated during welding will cause gas generation inside the battery cells and will cause certain damage to the electrodes and diaphragms inside the battery cells. In the present application, by disposing the electrical connector 21 within the fixing plate 20, after multiple battery cells 10 are installed on the fixing plate 20, they can directly abut against the electrical connector 21, so that an electrical connection is formed between multiple battery cells 10. Compared with the prior art, the battery cells 10 of the present application do not need to be welded to the electrical connector 21, which can avoid the generation of welding slag and is beneficial to improving the safety performance of the battery 100. In addition, the temperature rise can also be avoided, thereby ensuring the performance of the battery cells 10.

[0042] In another embodiment of the present application, please refer to Figure 2 and Figure 5 , the electrical connection end 11 includes a positive terminal 111 and a negative terminal 112 that are located on the same side of the battery cell 10 and are electrically isolated from each other. The electrical connector 21 includes a positive connector 211 for contacting the positive terminal 111 and a negative connector 212 for contacting the negative terminal 112. The positive connector 211 and the negative connector 212 are electrically isolated.

[0043] The battery cell 10 further includes a housing and an electrode assembly accommodated in the housing. The electrode assembly is a component in the battery cell 10 where an electrochemical reaction occurs. It includes a positive electrode plate, a separator, and a negative electrode plate. The separator is disposed between the positive electrode plate and the negative electrode plate to avoid short circuits. The positive terminal 111 and the negative terminal 112 are both hermetically connected to the housing. The positive terminal 111 is electrically connected to the positive electrode plate to lead out the positive electrode. The negative terminal 112 is electrically connected to the negative electrode plate to lead out the negative electrode. The shapes of the positive terminal 111 and the negative terminal 112 include, but are not limited to, cylindrical, cubic, and irregular shapes. And the shapes of the positive terminal 111 and the negative terminal 112 can be the same or different, which is not limited herein. An insulating member 15 for insulation is disposed between the positive terminal 111 and the negative terminal 112 to avoid short circuits. The material of the insulating member 15 includes, but is not limited to, insulating rubber, heat-insulating rubber, ABS, PSA, PA, PET, PP, PE, PVC, etc.

[0044] Compared with the positive terminal 111 and the negative terminal 112 being respectively arranged on the upper and lower sides of the battery cell 10, arranging both the positive terminal 111 and the negative terminal 112 on the same side of the battery cell 10 enables the positive connection member 211 and the negative connection member 212 to be integrally arranged within the same fixing plate 20, eliminating the need to separately arrange the fixing plate 20 on the upper and lower sides of the battery cell 10 and also eliminating the need to separately arrange the positive connection member 211 and the negative connection member 212 within two fixing plates 20. In this way, on the one hand, the structure of the battery 100 is simplified, the number of internal structural components of the battery 100 is reduced, and while the production cost is lowered, the assembly difficulty is also reduced. On the other hand, the size of the battery 100 in the height direction, that is, the up and down direction, can be reduced, which is beneficial to improving the energy density of the battery 100.

[0045] In another embodiment of the present application, please refer to Figure 3 , the positive terminal 111 and the negative terminal 112 are coaxially arranged, and the negative terminal 112 is located within the positive terminal 111. With such an arrangement, the complexity of the installation groove 22 of the fixing plate 20 can be reduced, thereby reducing the forming difficulty of the fixing plate 20.

[0046] In another embodiment of the present application, please refer to Figure 3 , the positive terminal 111, the negative terminal 112 and the housing are coaxially arranged. In this way, without the need to additionally arrange a structure for positioning and anti-fooling, it can also ensure that the electrical connection end 11 is in good contact with the electrical connection member 21.

[0047] In another embodiment of the present application, please refer to Figure 3 and Figure 5 , the battery cell 10 has a relatively arranged first side 13 and a second side 14 in its own height direction, and both the positive terminal 111 and the negative terminal 112 are located on the first side 13. Among them, compared with the surface of the positive terminal 111 far from the second side 14, the surface of the negative terminal 112 far from the second side 14 is closer to the second side 14. Specifically, the upper side of the battery cell 10 is the first side 13, the lower side of the battery cell 10 is the second side 14, and the upper surface of the negative terminal 112 is located below the upper surface of the positive terminal 111, so that the impedance can be reduced. In addition, since there is a height difference between the positive terminal 111 and the negative terminal 112, the electrical connection end 11 and the electrical connection member 21 can be regarded as a plug-in fit, which is beneficial to improving the connection stability between the two.

[0048] In another embodiment of the present application, please refer to Figure 3, the height difference H between the upper surface of the negative terminal 112 and the upper surface of the positive terminal 111 is 0.8 to 1 mm. As an example, the height difference H can be 0.8 mm, 0.85 mm, 0.9 mm, 0.95 mm, 1 mm, or the range between any two of the aforementioned values. By controlling the height difference H within the above range, while ensuring that the negative terminal 112 can be hermetically connected to the housing, the impedance of the battery cell 10 is made smaller.

[0049] In another embodiment of the present application, please refer to Figure 4 , the mounting groove 22 is formed on the bottom surface of the fixing plate 20, that is, on the lower surface of the fixing plate 20. The inner wall surface of the mounting groove 22 away from the bottom surface of the fixing plate 20, that is, the upper wall surface of the mounting groove 22 exposes the positive electrode connecting member 211. Thus, when the battery cell 10 is installed in the mounting groove 22 in the up and down direction, the battery cell 10 can be pushed upward with force, and the positive terminal 111 of the battery cell 10 is brought into close contact with the positive electrode connecting member 211 through the upward pressing force, thereby ensuring the electrical connection effect between the two.

[0050] In another embodiment of the present application, please refer to Figure 4 , the inner wall surface of the mounting groove 22 away from the bottom surface of the fixing plate 20, that is, the upper wall surface of the mounting groove 22 exposes the negative electrode connecting member 212. Thus, when the battery cell 10 is installed in the mounting groove 22 in the up and down direction, the battery cell 10 can be pushed upward with force, and the negative terminal 112 of the battery cell 10 is brought into close contact with the negative electrode connecting member 212 through the upward pressing force, thereby ensuring the electrical connection effect between the two.

[0051] In another embodiment of the present application, please refer to Figure 4 , a first insertion portion 2111 is provided on the surface of the positive electrode connecting member 211 that is exposed from the mounting groove 22 and close to the bottom surface of the fixing plate 20. A positive electrode insertion portion 1111 is provided on the surface of the positive terminal 111 in the height direction of the battery cell 10. Among them, the first insertion portion 2111 is adaptively inserted with the positive electrode insertion portion 1111. Specifically, the first insertion portion 2111 is provided on the lower surface of the part of the positive electrode connecting member 211 that is exposed from the mounting groove 22, and the positive electrode insertion portion 1111 is provided on the upper surface of the positive terminal 111. The first insertion portion 2111 is a groove structure, and the positive electrode insertion portion 1111 is a convex structure. Of course, in some other embodiments, the first insertion portion 2111 can be a convex structure, and the positive electrode insertion portion 1111 is a groove structure, as long as the positive terminal 111 can be inserted and matched with the positive electrode connecting member 211, which is not limited herein. By providing the first insertion portion 2111 and the positive electrode insertion portion 1111, there is an insertion and matching relationship between the positive terminal 111 and the positive electrode connecting member 211, which can improve the electrical connection effect between the positive terminal 111 and the positive electrode connecting member 211.

[0052] In another embodiment of the present application, please refer to Figure 4 , a second insertion portion 2121 is provided on the surface of the negative electrode connecting member 212 that is exposed from the installation groove 22 and close to the bottom surface of the fixing plate 20, and a negative electrode insertion portion 1121 is provided on the surface of the negative terminal 112 in the height direction of the battery cell 10. Among them, the second insertion portion 2121 is adaptively inserted with the negative electrode insertion portion 1121. Specifically, the second insertion portion 2121 is provided on the lower surface of the portion of the negative electrode connecting member 212 that is exposed from the installation groove 22, and the negative electrode insertion portion 1121 is provided on the upper surface of the negative terminal 112. The second insertion portion 2121 is a groove structure, and the negative electrode insertion portion 1121 is a convex structure. Of course, in some other embodiments, the second insertion portion 2121 may be a convex structure, and the negative electrode insertion portion 1121 is a groove structure, as long as the negative terminal 112 can be inserted and matched with the negative electrode connecting member 212, which is not limited herein. By providing the second insertion portion 2121 and the negative electrode insertion portion 1121, there is an insertion and matching relationship between the negative terminal 112 and the negative electrode connecting member 212, which can improve the electrical connection effect between the negative terminal 112 and the negative electrode connecting member 212.

[0053] In another embodiment of the present application, please refer to Figure 1 , the battery cell 10 is threadedly connected to the installation groove 22. With such a setting, on the one hand, the electrical connection end 11 and the electrical connecting member 21 can be in close contact, thereby ensuring the electrical connection effect between the two. On the other hand, the connection stability between the battery cell 10 and the fixing plate 20 can be improved, and the shaking degree of the battery cell 10 during the use of the battery 100 can be reduced.

[0054] It can be understood that an internal thread can be provided on the battery cell 10, and an external thread 12 can be provided on the installation groove 22. Or an external thread 12 can be provided on the battery cell 10, and an internal thread can be provided on the installation groove 22. In this embodiment, please refer to Figure 2 , an external thread 12 is provided on the outer surface of the battery cell 10, and an internal thread adapted to be connected to the external thread 12 is provided on the inner wall of the installation groove 22. Specifically, an external thread 12 is provided at the upper end of the outer peripheral surface of the housing, and an internal thread is provided at the lower end of the inner wall of the installation groove 22. Compared with providing an internal thread on the housing and an external thread 12 on the installation groove 22, directly providing an external thread 12 on the outer peripheral surface of the housing and an internal thread on the inner wall surface of the installation groove 22 can reduce the processing difficulty and the assembly difficulty.

[0055] In another embodiment of the present application, please refer to Figure 5, the external thread 12 on the housing includes a plurality of first thread segments 121 and a plurality of second thread segments 122 arranged at intervals along a helix. Along the traveling direction of the helix, there is at least one second thread segment 122 between two adjacent first thread segments 121, and the length of the second thread segment 122 is less than that of the first thread segment 121. The discontinuous design can avoid the assembly stress caused by the complete engagement of the threads and reduce the potential damage to the components. Such a structure is beneficial to reducing the risk that the electrical connection end 11 and the electrical connector 21 are misaligned due to the connection failure and shaking of the battery cell 10 caused by the assembly stress under complex operating conditions, and can ensure the close contact between the electrical connection end 11 and the electrical connector 21.

[0056] In another embodiment of the present application, the battery cell 10 is bonded in the mounting groove 22. Specifically, after the battery cell 10 is inserted into the mounting groove 22, resin is filled in the mounting groove 22, so as to achieve the purpose of bonding the battery cell 10 in the mounting groove 22. Compared with the method of mounting the battery cell 10 in the mounting groove 22 by using a threaded connection, the bonding method does not require the processing of internal and external threads 12, and can reduce the production cost.

[0057] In another embodiment of the present application, the fixing plate 20 is made of an insulating material, and the positive electrode connector 211 and the negative electrode connector 212 are arranged at intervals to electrically isolate the positive electrode connector 211 and the negative electrode connector 212.

[0058] The present application also provides an electrical device including the above-mentioned battery 100. Due to the adoption of the above-mentioned battery 100, the safety performance of the electrical device is improved. The electrical device may include, but is not limited to, mobile phones, tablets, laptop computers, electric toys, power tools, battery cars, electric vehicles, ships, spacecraft, etc. Among them, the electric toys may include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, electric aircraft toys, etc., and the spacecraft may include airplanes, rockets, space shuttles, spaceships, etc.

[0059] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery, characterized in that: include: At least two battery cells (10), each of the battery cells (10) having an electrical connection terminal (11); A fixing plate (20) having a mounting groove (22) for mounting the battery cell (10); An electrical connector (21) is disposed in the fixing plate (20), the mounting groove (22) exposes the electrical connector (21), and the electrical connector (21) is used to contact the electrical connection end (11) to electrically connect at least two battery cells (10).

2. The battery according to claim 1, characterized in that: The electrical connection end (11) comprises a positive terminal (111) and a negative terminal (112) which are located on the same side of the battery cell (10) and are electrically isolated from each other; the electrical connector (21) comprises a positive connector (211) for contacting the positive terminal (111) and a negative connector (212) for contacting the negative terminal (112); the positive connector (211) and the negative connector (212) are electrically isolated from each other.

3. The battery according to claim 2, characterized in that: The positive terminal (111) and the negative terminal (112) are coaxially arranged.

4. The battery according to claim 2, characterized in that: The battery cell (10) has a first side (13) and a second side (14) arranged opposite to each other in its height direction, the positive terminal (111) and the negative terminal (112) are both located on the first side (13), wherein the surface of the negative terminal (112) away from the second side (14) is closer to the second side (14) than the surface of the positive terminal (111) away from the second side (14).

5. The battery according to claim 2, characterized in that: The mounting groove (22) is provided on the bottom surface of the fixing plate (20); The inner wall surface of the mounting groove (22) away from the bottom surface of the fixing plate (20) exposes the positive electrode connector (211); And / or, the inner wall surface of the mounting groove (22) away from the bottom surface of the fixing plate (20) exposes the negative electrode connector (212).

6. The battery according to claim 5, characterized in that At least one of the following conditions is met: (1) The positive electrode connector (211) is exposed in the mounting groove (22), and a first plug-in portion (2111) is provided on a surface close to the bottom surface of the fixing plate (20), and a positive electrode plug-in portion (1111) is provided on a surface of the positive electrode terminal (111) in a height direction of the battery cell (10), wherein the first plug-in portion (2111) is adapted to be plugged with the positive electrode plug-in portion (1111); (2) The negative electrode connector (212) is exposed in the mounting groove (22), and a second plug-in portion (2121) is provided on a surface close to the bottom surface of the fixing plate (20), and a negative electrode plug-in portion (1121) is provided on a surface of the negative electrode terminal (112) in a height direction of the battery cell (10), wherein the second plug-in portion (2121) is adapted to be plugged with the negative electrode plug-in portion (1121).

7. The battery according to any one of claims 1 to 6, characterized in that: The battery cell (10) is threadedly connected or bonded in the mounting groove (22); And / or, the fixing plate (20) is made of insulating material.

8. The battery according to claim 7, characterized in that: The outer surface of the battery cell (10) is provided with an external thread (12), and the inner wall of the mounting groove (22) is provided with an internal thread adapted to be connected with the external thread (12).

9. The battery according to claim 8, characterized in that: The external thread (12) comprises a plurality of first thread segments (121) and a plurality of second thread segments (122) arranged at intervals along a spiral line; along the direction of travel of the spiral line, there is at least one second thread segment (122) between two adjacent first thread segments (121); the length of the second thread segment (122) is less than the length of the first thread segment (121).

10. An electrical equipment, characterized in that: A battery (100) comprising any one of claims 1 to 9.

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