Battery cover plate and battery
By designing switchable conductive sheets and elastic elements on the battery cover, the problem of short-circuit power disconnection in case of battery malfunction within a limited space is solved, improving battery safety and avoiding safety hazards caused by overcharging.
Patent Information
- Application Number
- CN202422864897.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-11-22
AI Technical Summary
In the existing technology, it is difficult to effectively flip the battery cover to achieve a short circuit between the positive and negative electrodes within a limited space, which leads to a significant safety hazard when the battery is overcharged.
Design a battery cover plate comprising a plate body and a conductive sheet. The conductive sheet can switch positions in different states under normal and abnormal conditions. Through the action of an elastic element, an electrical connection or insulation is formed between the plate body and the second electrode, so as to achieve insulation of the battery during normal charging and short circuit and power cut-off during abnormal conditions.
When the battery malfunctions, the conductive plate automatically switches to the electrical connection state, achieving a short circuit between the positive and negative terminals, disconnecting the charging circuit, improving battery safety, and avoiding safety issues caused by overcharging.
Smart Images
Figure CN223598846U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery technology field especially relates to a battery cover plate and battery. BACKGROUND
[0002] With the progress of science and technology, new energy vehicles develop particularly fast, and batteries are widely used in the field of new energy vehicles as power energy of new energy vehicles. However, the application of batteries in new energy vehicles may also have many safety problems, for example, battery fire and explosion caused by overcharging is one of the safety problems of the application of batteries in new energy vehicles.
[0003] In the prior art, one of the electrodes of the battery is usually electrically connected with the battery cover plate, and a turnover piece is welded on the other electrode, when the battery is abnormal, the internal pressure pushes the turnover piece to connect with the battery cover plate to realize the short circuit of the positive and negative electrodes, thereby disconnecting the battery charging. However, this technology needs to increase the stress area of the turnover piece to realize the turnover of the turnover piece, which is difficult to realize in the case of limited space of the cover plate. UTILITY MODEL CONTENT
[0004] The utility model provides a battery cover plate for realizing the short circuit of the positive and negative electrodes of the battery to disconnect the battery charging when the battery is abnormal.
[0005] In the first aspect, the utility model provides a battery cover plate, which is assembled in a battery, and the battery cover plate comprises:
[0006] A plate body is provided with a first mounting hole and a second mounting hole, the first mounting hole is used for assembling the first electrode electrically connected with the plate body, and the second mounting hole is used for assembling the second electrode insulated from the plate body;
[0007] A conductive sheet is arranged in the second mounting hole, and the conductive sheet is electrically connected with the second electrode, the conductive sheet can be switched between a first position spaced from the plate body and a second position in contact with the plate body along a preset direction, the conductive sheet is configured to be in the first position to be insulated from the plate body when the battery is normal, and be in the second position to be electrically connected with the plate body when the battery is abnormal.
[0008] In some embodiments, an elastic member is further included, the elastic member is at least partially compressed and arranged in the second mounting hole, one end of the elastic member abuts against the conductive sheet and exerts an elastic force on the conductive sheet along the preset direction and towards the interior of the battery.
[0009] In some embodiments, the elastic member is sleeved on the second electrode.
[0010] In some embodiments, the other end of the elastic member abuts against the second electrode.
[0011] In some embodiments, the battery cover plate further comprises a protrusion part electrically connected with the plate body, the protrusion part is arranged on the inner wall of the second mounting hole;
[0012] When the conductive sheet is in the first position, the conductive sheet is spaced apart from the protrusion part in the preset direction, and when the conductive sheet is in the second position, the conductive sheet abuts against the protrusion part.
[0013] In some embodiments, the plate body is provided with a first opening, the first opening communicates the second mounting hole with the inside of the battery; the protrusion part is provided with a second opening, the second opening communicates the second mounting hole with the outside of the battery; the conductive sheet is configured to block the first opening and the second opening.
[0014] In some embodiments, a first insulating part is further included, the first insulating part is arranged on the inner wall of the second mounting hole; the conductive sheet is sleeved on the second electrode, and the conductive sheet has a first edge and a second edge, the first edge is in contact with the first insulating part, and the second edge is in contact with the second electrode.
[0015] In some embodiments, the conductive sheet and the first insulating part form an interference fit.
[0016] In some embodiments, a second insulating part is further included, the second insulating part is arranged between the protrusion part and the second electrode.
[0017] In a second aspect, the utility model further provides a battery, including the battery cover plate as above.
[0018] The application provides a battery cover plate, which has at least the following beneficial effects compared with the prior art:
[0019] The first electrode is electrically connected with the cover plate, and the second electrode is provided with a conductive sheet in the second mounting hole, which can be switched between the first position and the second position. Different electrical connection states of the battery in the normal state or in the abnormal state during charging can be realized, that is, the first electrode is not electrically connected with the second electrode through the plate body and the conductive sheet when the battery is in the normal state during charging, so that the battery can be normally charged. When the battery is in the abnormal state during charging, such as overcharging, the first electrode is electrically connected with the second electrode through the plate body and the conductive sheet, so that the first electrode and the second electrode are short-circuited, and the charging circuit is short-circuited, thereby disconnecting the battery charging. BRIEF DESCRIPTION OF DRAWINGS
[0020] The utility model will be described in more detail below based on the embodiments and with reference to the drawings.
[0021] Figure 1 is a perspective sectional view of a battery cover plate provided by an embodiment of the present application;
[0022] Figure 2 is a partial sectional view of a battery cover plate provided by an embodiment of the present application.
[0023] Reference signs:
[0024] 1. A battery cover plate;
[0025] 11. A plate body; 111, a first mounting hole; 112, a second mounting hole; 113, a first opening;
[0026] 12. A conductive sheet; 121, a first edge; 122, a second edge;
[0027] 13. An elastic member;
[0028] 14. A protruding portion; 141, a second opening;
[0029] 15. A first insulating member;
[0030] 16. A second insulating member;
[0031] 21. A first electrode; 22, a second electrode. DETAILED DESCRIPTION
[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.
[0033] In the present application, the terms “mounting”, “setting”, “provided with”, “connection”, “connected” should be understood broadly. For example, it can be fixed connection, detachable connection, or integral configuration; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0034] In addition, the terms “first”, “second” and the like are mainly used to distinguish different devices, elements or components (the specific types and configurations can be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of “multiple” is two or more.
[0035] The technical solutions of the present application will be further described below in combination with specific embodiments and drawings.
[0036] In a first aspect, the utility model provides a battery cover plate 1, assemble in battery. The battery cover plate 1 includes plate body 11 and conductive sheet 12. Plate body 11 is provided with first mounting hole 111 and second mounting hole 112, first mounting hole 111 is used to assemble in the first electrode 21 of plate body 11 electric connection, second mounting hole 112 is used to assemble in the second electrode 22 of plate body 11 insulation. Conductive sheet 12 is arranged in second mounting hole 112, and conductive sheet 12 is electrically connected with second electrode 22, and conductive sheet 12 can be switched between the first position spaced apart from plate body 11 and the second position in contact with plate body 11 along the preset direction (such as Figure 2 The direction shown in the middle Y direction), and the conductive sheet 12 is configured to be in the first position to be insulated from the plate body 11 when the battery is normal, and to be in the second position to be electrically connected with the plate body 11 when the battery is abnormal.
[0037] The battery includes a housing and a battery cover plate 1, and the battery cover plate 1 is assembled to the housing to enclose the inside of the battery, wherein the position of the battery cover plate 1 assembled to the battery is located at the top of the battery.
[0038] The first mounting hole 111 can penetrate the plate body 11 of the battery cover plate 1 along the preset direction, and when the first electrode 21 is assembled in the first mounting hole 111, the first electrode 21 is arranged in the first mounting hole 111, and one end of the first electrode 21 extends into the inside of the battery, and the other end is located outside the battery. Similarly, the second mounting hole 112 can penetrate the plate body 11 of the battery cover plate 1 along the preset direction, and when the second electrode 22 is assembled in the second mounting hole 112, the second electrode 22 is arranged in the second mounting hole 112, and one end of the second electrode 22 extends into the inside of the battery, and the other end is located outside the battery.
[0039] Wherein, the plate body 11 has conductivity. When the first electrode 21 is assembled in the first mounting hole 111, the first electrode 21 is in contact with the plate body 11 to form an electrical connection between the first electrode 21 and the plate body 11; when the second electrode 22 is assembled in the second mounting hole 112, the second electrode 22 is not in contact with the plate body 11, that is, the second electrode 22 is insulated from the plate body 11.
[0040] It should be noted that the conductive sheet 12 is in contact with the second electrode 22 to form an electrical connection, that is, during the switching of the conductive sheet 12 between the first position and the second position, the conductive sheet 12 is still in contact with the second electrode 22 to form an electrical connection.
[0041] In the embodiment, when the battery is in a normal state during charging, the conductive sheet 12 is in the first position, and the conductive sheet 12 in the first position is not in contact with the plate body 11, that is, the conductive sheet 12 is insulated from the plate body 11 at this time, so that no path is formed between the first electrode 21 and the second electrode 22, and the battery can continue to be in a charging state; when the battery is in an abnormal state during charging, such as overcharging, the gas generated inside the battery pushes the conductive sheet 12 to switch from the first position to the second position, and the conductive sheet 12 in the second position is in contact with the plate body 11 to form an electrical connection, so that a short circuit is formed between the first electrode 21 and the second electrode 22, and at the same time, the charging circuit is short-circuited, and the charging is stopped.
[0042] It should be noted that the conductive sheet 12 switches between the first position and the second position in a moving manner, that is, the conductive sheet 12 moves between the first position and the second position.
[0043] It can be understood that the first electrode 21 can be a positive electrode, and the second electrode 22 can be a negative electrode. Of course, the first electrode 21 can also be a negative electrode, and the second electrode 22 can be a positive electrode, which is not limited here.
[0044] In the embodiment, by arranging the conductive sheet 12 capable of switching between the first position and the second position in the second mounting hole 112, different electrical connection states of the battery in a normal state or an abnormal state during charging can be realized, that is, when the battery is in a normal state during charging, the first electrode 21 will not be electrically connected to the second electrode 22 through the plate body 11 and the conductive sheet 12, so that the battery can be normally charged, and when the battery is in an abnormal state during charging, the first electrode 21 is electrically connected to the second electrode 22 through the plate body 11 and the conductive sheet 12, so that the first electrode 21 and the second electrode 22 are short-circuited, the charging circuit is short-circuited, and the battery charging is disconnected.
[0045] In some embodiments, an elastic member 13 is further included, the elastic member 13 is at least partially compressed and arranged in the second mounting hole 112, and one end of the elastic member 13 abuts against the conductive sheet 12 and applies an elastic force to the conductive sheet 12 in a preset direction and towards the inside of the battery.
[0046] In the embodiment, the elastic member 13 is generally a spring.
[0047] The elastic member 13 applies an elastic force to the conductive sheet 12 in a preset direction and towards the inside of the battery, in other words, the elastic member 13 applies an elastic force to the conductive sheet 12 in the preset direction from the second position to the first position.
[0048] In the embodiment, when the battery is in normal state during charging, the conductive sheet 12 is in the first position under the elastic force of the elastic member 13, the conductive sheet 12 in the first position does not contact the plate body 11, that is, the conductive sheet 12 is insulated from the plate body 11 at this time, so that the first electrode 21 and the second electrode 22 do not form a path, and the battery can continue to be in the charging state; when the battery is in an abnormal state during charging, the pressure in the battery increases, so that the conductive sheet 12 can overcome the elastic force and move from the first position to the second position, the conductive sheet 12 in the second position contacts the plate body 11 to form an electrical connection, so that the first electrode 21 and the second electrode 22 form a short circuit, the charging circuit is short-circuited, and the battery charging is disconnected.
[0049] In other embodiments, when the conductive sheet 12 is in the first position, the elastic member 13 can be in a natural elongation state, that is, the elastic member 13 is neither elongated nor compressed at this time.
[0050] In some embodiments, the elastic member 13 is sleeved on the second electrode 22.
[0051] In the embodiment, the elastic member 13 is sleeved on the second electrode 22, and the elastic member 13 is gradually compressed along the preset direction during the movement of the conductive sheet 12 from the first position to the second position, and the second electrode 22 can limit the deformation of the elastic member 13 in other directions, thereby ensuring the normal work of the elastic member 13.
[0052] In other embodiments, the elastic member 13 can also be arranged on one side of the second electrode 22.
[0053] In some embodiments, the other end of the elastic member 13 abuts against the second electrode 22.
[0054] It can be understood that the elastic member 13 is generally a spring made of metal, so the spring has conductivity. If the other end of the spring abuts against the plate body 11, the plate body 11 and the spring form an electrical connection, and then the first electrode 21 and the second electrode 22 are short-circuited through the plate body 11 and the elastic member 13. In order to solve this problem and reduce the complexity of the structure, in the embodiment, one end of the elastic member 13 abuts against the conductive sheet 12, and the other end of the elastic member 13 abuts against the second electrode 22 at an end outside the battery, so that the elastic member 13 can form a gap with the plate body 11 to form insulation, thereby avoiding the short circuit of the first electrode 21 and the second electrode 22 through the plate body 11 and the elastic member 13.
[0055] In other embodiments, a fixing portion sleeved on the second electrode 22 can be additionally arranged, and the other end of the elastic member 13 abuts against the fixing portion.
[0056] In some embodiments, the battery cover plate 1 further comprises a protrusion 14 electrically connected with the plate body 11, the protrusion 14 is arranged on the inner wall of the second mounting hole 112. When the conductive sheet 12 is in the first position, the conductive sheet 12 is spaced apart from the protrusion 14 in the preset direction, and when the conductive sheet 12 is in the second position, the conductive sheet 12 abuts against the protrusion 14.
[0057] The protrusion 14 is made of metal and has electrical conductivity, so the first electrode 21 is electrically connected with the protrusion 14 through the plate body 11. It can be understood that the protrusion 14 can be detachably arranged on the plate body 11, or can be integrally formed with the plate body 11, which is not limited herein. In addition, the protrusion 14 can be arranged near the second mounting hole 112 away from the inside of the battery.
[0058] In the embodiment, when the battery is in a normal state during charging, the conductive sheet 12 is in the first position, and the conductive sheet 12 in the first position is spaced apart from the conductive sheet 12 in the preset direction, so that the conductive sheet 12 is insulated from the plate body 11, so that the first electrode 21 and the second electrode 22 do not form a path, and the battery can continue to be in a charging state; when the battery is in an abnormal state during charging, the conductive sheet 12 is switched from the first position to the second position, and the conductive sheet 12 in the second position contacts the protrusion 14 to form an electrical connection, because the first electrode 21 is electrically connected with the protrusion 14 through the plate body 11, and the second electrode 22 is electrically connected with the conductive sheet 12, so that the first electrode 21 and the second electrode 22 form a short circuit, so that the charging circuit is short-circuited, thereby disconnecting the battery charging.
[0059] In one example, the elastic member 13 is sleeved on the second electrode 22, and an end of the elastic member 13 away from the conductive sheet 12 abuts against an end of the second electrode 22 located outside the battery, that is, the end of the elastic member 13 away from the conductive sheet 12 protrudes out of the second mounting hole 112. In order to avoid interference between the protrusion 14 and the elastic member 13, a gap is formed between the side of the protrusion 14 close to the second electrode 22 and the second electrode 22 for the elastic member 13 to stretch and contract to avoid the elastic member 13, and a gap is also formed between the side of the protrusion 14 close to the second electrode 22 and the elastic member 13 to prevent the protrusion 14 from interfering with the elastic member 13.
[0060] In other embodiments, when the conductive sheet 12 is in the second position, the conductive sheet 12 can be in contact with the inner wall of the second mounting hole 112 formed by the plate body 11 to form an electrical connection.
[0061] In some embodiments, the plate body 11 is provided with a first opening 113, which communicates the second mounting hole 112 with the inside of the battery. The protruding part 14 is provided with a second opening 141, which communicates the second mounting hole 112 with the outside of the battery. The conductive sheet 12 is configured to block the first opening 113 from the second opening 141.
[0062] In some embodiments, the second mounting hole 112 forms an air cavity in the space left after removing the space occupied by the second electrode 22. The conductive sheet 12 is configured to block the first opening 113 from the second opening 141, which means that the conductive sheet 12 divides the air cavity into a first sub-cavity and a second sub-cavity, which are not in communication with each other, the first opening 113 communicates the first sub-cavity with the inside of the battery, the second opening 141 communicates the second sub-cavity with the outside of the battery, and the protruding part 14 is located in the second sub-cavity.
[0063] It can be understood that, since the first opening 113 communicates the first sub-cavity with the inside of the battery, the pressure in the first sub-cavity is the same as the pressure in the inside of the battery; since the second opening 141 communicates the second sub-cavity with the outside of the battery, the pressure in the second sub-cavity is the same as the pressure in the outside of the battery.
[0064] When the battery is in a normal state during charging, the pressure in the inside of the battery is equal to the pressure in the outside of the battery, so that the pressure in the first sub-cavity is equal to the pressure in the second sub-cavity, the conductive sheet 12 is in the first position and does not move, at this time, the conductive sheet 12 is spaced from the protruding part 14, i.e. the conductive sheet 12 is insulated from the protruding part 14, so that no path is formed between the first electrode 21 and the second electrode 22, and the battery can continue to be in a charging state.
[0065] When the battery is in an abnormal state during charging, such as overcharging, the pressure in the inside of the battery increases, so that the pressure in the first sub-cavity is greater than the pressure in the second sub-cavity, the conductive sheet 12 moves from the first position to the second position under the pressure difference between the first sub-cavity and the second sub-cavity, and the conductive sheet 12 contacts and forms an electrical connection with the protruding part 14 when it moves to the second position, so that a short circuit is formed between the first electrode 21 and the second electrode 22, the charging circuit is short-circuited, and the battery charging is disconnected.
[0066] In some other embodiments, the second opening 141 can be provided on the plate body 11.
[0067] In some embodiments, the battery cover plate 1 further comprises a first insulating part 15, which is provided on the inner wall of the second mounting hole 112. The conductive sheet 12 is sleeved on the second electrode 22, and the conductive sheet 12 has a first edge 121 and a second edge 122, the first edge 121 contacts the first insulating part 15, and the second edge 122 contacts the second electrode 22.
[0068] The first insulating piece 15 is arranged on the inner wall of the second mounting hole 112, so that the conductive sheet 12 is in contact with the first insulating piece 15 no matter the conductive sheet 12 is in the first position or the second position or between the first position and the second position, and the first opening 113 and the second opening 141 are separated, and the conductive sheet 12 is insulated from the plate body 11.
[0069] In one example, the second electrode 22 is a cylinder, the conductive sheet 12 is sleeved on the second electrode 22, and the second edge 122 of the conductive sheet 12 is in contact with the second electrode 22 to form an electrical connection between the conductive sheet 12 and the second electrode 22, and the first edge 121 of the conductive sheet 12 is in contact with the first insulating piece 15 to separate the first opening 113 and the second opening 141.
[0070] In other embodiments, the first insulating piece 15 can be arranged on the first edge 121.
[0071] In some embodiments, the conductive sheet 12 and the first insulating piece 15 form an interference fit.
[0072] The conductive sheet 12 and the first insulating piece 15 form an interference fit to separate the first opening 113 and the second opening 141.
[0073] In other embodiments, the conductive sheet 12 and the first insulating piece 15 can form a transition fit with a sealing effect.
[0074] In some embodiments, the battery cover plate 1 further comprises a second insulating piece 16, and the second insulating piece 16 is arranged between the protruding portion 14 and the second electrode 22.
[0075] The second insulating piece 16 is arranged between the protruding portion 14 and the second electrode 22, so that the second electrode 22 and the protruding portion 14 are insulated.
[0076] In other embodiments, the second electrode 22 can also form a gap with the protruding portion 14 to be insulated.
[0077] In a second aspect, the utility model also provides a battery (not shown in the figure), which comprises the battery cover plate 1 as described above.
[0078] The battery comprises a shell, a battery cover plate 1 and a battery core, the battery cover plate 1 is assembled on the shell to close the inside of the battery, wherein the position of the battery cover plate 1 assembled on the battery is located at the top of the battery, and the battery core is arranged in the inside of the battery.
[0079] Although the utility model has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the utility model and equivalent replacements can be made to the components therein. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A battery cover, characterized in that, Assembled in the battery, the battery cover includes: A plate body, the plate body being provided with a first mounting hole and a second mounting hole, the first mounting hole being used for mounting a first electrode electrically connected to the plate body, and the second mounting hole being used for mounting a second electrode insulated from the plate body; and A conductive sheet is disposed in the second mounting hole and electrically connected to the second electrode. The conductive sheet is capable of switching between a first position spaced apart from the plate and a second position in contact with the plate along a preset direction. The conductive sheet is configured to be in the first position to be insulated from the plate when the battery is normal, and to be in the second position to be electrically connected to the plate when the battery is abnormal.
2. The battery cover according to claim 1, characterized in that, It also includes an elastic element, which is at least partially compressed within the second mounting hole, one end of which abuts against the conductive sheet and applies an elastic force to the conductive sheet along the preset direction and toward the interior of the battery.
3. The battery cover according to claim 2, characterized in that, The elastic element is sleeved on the second electrode.
4. The battery cover according to claim 2, characterized in that, The other end of the elastic element abuts against the second electrode.
5. The battery cover according to any one of claims 1-4, characterized in that, The battery cover also includes a protrusion electrically connected to the plate body, the protrusion being disposed on the inner wall of the second mounting hole; When the conductive sheet is in the first position, the conductive sheet and the protrusion are spaced apart in the preset direction; when the conductive sheet is in the second position, the conductive sheet abuts against the protrusion.
6. The battery cover according to claim 5, characterized in that, The plate has a first opening that connects the second mounting hole to the interior of the battery; the protrusion has a second opening that connects the second mounting hole to the exterior of the battery; the conductive sheet is configured to separate the first opening from the second opening.
7. The battery cover according to claim 6, characterized in that, It also includes a first insulating member disposed on the inner wall of the second mounting hole; the conductive sheet is sleeved on the second electrode, and the conductive sheet has a first edge and a second edge, the first edge being in contact with the first insulating member, and the second edge being in contact with the second electrode.
8. The battery cover according to claim 7, characterized in that, The conductive sheet forms an interference fit with the first insulating element.
9. The battery cover according to claim 5, characterized in that, It also includes a second insulating member disposed between the protrusion and the second electrode.
10. A battery, characterized in that, Includes the battery cover as described in any one of claims 1-9.