Battery and battery module
By introducing a heat transfer structure and a liquid phase change working fluid into the battery, the problem of temperature non-uniformity in large-capacity lithium batteries is solved, achieving uniform temperature distribution and protecting battery safety and performance.
Patent Information
- Application Number
- CN202520314718.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-02-26
AI Technical Summary
The increased capacity of existing lithium battery cells has led to large temperature differences, posing safety risks, especially since excessively high terminal temperatures can easily damage the battery.
The heat transfer structure and liquid phase change working fluid are used to transfer heat through the first, second and third heat transfer structures, resulting in uniform temperature distribution and avoiding excessively high electrode temperatures.
It effectively evens out the internal temperature of the battery, protects the terminals and connections, prevents overheating, and improves battery safety and performance.
Smart Images
Figure CN223858253U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery technology field, concretely relates to a battery and battery module. BACKGROUND
[0002] With the large-scale access of renewable energy and the popularity of electric vehicles, energy storage battery technology gradually becomes the focus of people's attention. In recent years, the energy storage industry has developed rapidly, and with more and more domestic and foreign energy storage projects starting to move towards long-time energy storage of 4 hours and above, there is an urgent need for large-capacity, long-life energy storage cells to match them. By increasing the capacity of the battery monomer, the number of structural parts can be reduced, and the number of clusters can also be reduced, reducing the cost of cluster management and other relatively peripheral costs, which can effectively reduce the cost and bring better price competitiveness to manufacturers.
[0003] However, the existing lithium battery monomer capacity is getting larger and larger, and the volume is also getting larger and larger, so that the temperature of the battery monomer at different positions in the charging and discharging process has a large difference, and the temperature of the battery pole will be too high in the battery charging and discharging process, which has a certain safety risk and is easy to cause damage to the battery. UTILITY MODEL CONTENTS
[0004] The utility model aims at the deficiency of prior art, and provides a battery and battery module.
[0005] In the first aspect, the utility model provides a battery, which comprises a winding core, a top cover, two connecting sheets, a shell provided with a top opening, the top cover comprises a positive pole, a negative pole, a first heat transfer structure, an explosion-proof valve and an electrolyte injection port penetratingly arranged on the first heat transfer structure, the positive pole, the negative pole and the explosion-proof valve are connected to the first heat transfer structure respectively, the connecting sheet comprises a second heat transfer structure, a first connecting part and a second connecting part connected to the second heat transfer structure respectively, the inner side of the shell is provided with a first mounting cavity used for accommodating the winding core and communicating with the opening of the shell, the positive lug of one winding core is connected to the first connecting part of one connecting sheet, the negative lug is connected to the first connecting part of another connecting sheet, and the top parts of the second connecting parts of the two connecting sheets are connected to the bottom parts of the positive pole and the negative pole respectively, and the bottom part of the top cover is connected to the top part of the shell.
[0006] Further, the first heat transfer structure comprises a first heat transfer body, a second accommodating cavity for accommodating liquid phase change working medium arranged in the first heat transfer body, and a first injection port arranged at the top of the first heat transfer body and communicating with the second accommodating cavity.
[0007] Further, the second heat transfer structure comprises a second heat transfer body, a third accommodating cavity for accommodating liquid phase change working medium arranged in the second heat transfer body, and a second injection port arranged at the top of the second heat transfer body and communicating with the third accommodating cavity.
[0008] Further, the first heat transfer body comprises two first aluminum plates, edges of the two first aluminum plates are respectively welded or die-cast connected.
[0009] Further, the second heat transfer body connected to one of the connecting pieces comprises two second aluminum plates, edges of the two second aluminum plates are respectively welded or die-cast connected; the second heat transfer body connected to the other connecting piece comprises two first copper plates, edges of the two first copper plates are respectively welded or die-cast connected.
[0010] Further, the first connecting part is ultrasonically welded to the positive or negative tab, and the second connecting part is ultrasonically welded to the positive or negative post.
[0011] Further, the first connecting part on one of the connecting pieces is symmetrically arranged in multiple, and the winding core is arranged in multiple corresponding to the multiple first connecting parts on the connecting piece.
[0012] In a second aspect, the utility model also provides a battery module, including battery piece, and the battery as described in the first aspect, the battery piece includes first base body, third heat transfer structure connected to the outer periphery of first base body, two first positioning holes are arranged through first base body, the positive or negative post of adjacent two batteries is connected to two first positioning holes respectively.
[0013] Further, the third heat transfer structure comprises a third heat transfer body, a fourth accommodating cavity arranged on the inner side of the third heat transfer body for accommodating liquid phase change working medium, and a third injection port arranged on the top of the second heat transfer body and communicated with the fourth accommodating cavity.
[0014] Further, the third heat transfer body comprises two third aluminum plates, edges of the two third aluminum plates are respectively welded or die-cast connected.
[0015] The battery and the battery module have the following beneficial effects:
[0016] The first heat transfer structure on the top cover and the second heat transfer structure on the connecting piece can both transfer heat, the second heat transfer structure can accelerate heat conduction when the temperature at the connecting position of the connecting piece and the tab locally rises, and the first heat transfer structure can accelerate heat conduction when the temperature at the connecting position of the connecting piece and the post locally rises, so that the temperature distribution of the connecting piece is more uniform, the heat at the post can be transferred to the top cover, the temperature rise of the post during the charging and discharging process of the battery is avoided, and the battery is protected. BRIEF DESCRIPTION OF DRAWINGS
[0017] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the application. In the drawings:
[0018] Figure 1 A structural schematic view of a top cover in a battery according to an embodiment of the present application;
[0019] Figure 2 A structural schematic view of a connecting piece in a battery according to an embodiment of the present application;
[0020] Figure 3 A sectional view of a first heat transfer structure in a battery according to an embodiment of the present application;
[0021] Figure 4 A sectional view of a second heat transfer structure in a battery according to an embodiment of the present application, wherein the second heat transfer structure comprises two second aluminum plates;
[0022] Figure 5 A sectional view of a second heat transfer structure in a battery according to an embodiment of the present application, wherein the second heat transfer structure comprises two first copper plates;
[0023] Figure 6 A structural schematic view of a battery tab in a battery according to an embodiment of the present application;
[0024] Figure 7 A sectional view of a third heat transfer structure in a battery according to an embodiment of the present application;
[0025] Figure 8 A structural schematic view of a battery module according to an embodiment of the present application.
[0026] In the drawings: 1-battery, 2-housing, 3-top cover, 31-first heat transfer structure, 311-second accommodating cavity, 312-first aluminum plate, 32-positive pole, 33-explosion-proof valve, 34-negative pole, 35-electrolyte injection port, 36-first injection port, 4-connecting piece, 41-second heat transfer structure, 411-third accommodating cavity, 412-second aluminum plate, 413-first copper plate, 42-first connecting part, 43-second connecting part, 44-second injection port, 5-battery tab, 51-first base body, 511-first positioning hole, 52-third heat transfer structure, 521-fourth accommodating cavity, 522-third aluminum plate, 53-third injection port. DETAILED DESCRIPTION
[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described in the following with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model. It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other arbitrarily without conflict.
[0028] Please refer to Figures 1-5 , 8. A battery, comprising a winding core, a top cover 3, two connecting sheets 4, and a shell 2 provided with a top opening; the top cover 3 comprises a positive pole 32, a negative pole 34, a first heat transfer structure 31, an explosion-proof valve 33, and an electrolyte injection port 35 provided through the first heat transfer structure 31; the positive pole 32, the negative pole 34, and the explosion-proof valve 33 are connected to the first heat transfer structure 31; the connecting sheet 4 comprises a second heat transfer structure 41, a first connecting part 42, and a second connecting part 43 connected to the second heat transfer structure 41; the inner side of the shell 2 is provided with a first mounting cavity for accommodating the winding core and communicating with the opening of the shell 2; the positive pole lug of one winding core is connected to the first connecting part 42 of one connecting sheet 4, and the negative pole lug is connected to the first connecting part 42 of another connecting sheet 4; the top parts of the second connecting parts 43 of the two connecting sheets 4 are respectively connected to the bottom of the positive pole 32 and the bottom of the negative pole 34; and the bottom of the top cover 3 is connected to the top of the shell 2.
[0029] Here, in the charging and discharging process of the battery 1, the temperature at the connection between the first connecting portion 42 of one of the connecting pieces 4 and the positive tab of the winding core may locally rise, so that the temperature at this position of the connecting piece 4 is higher than the temperature at other positions of the connecting piece 4. The second heat transfer structure 41 of the connecting piece 4 absorbs the heat at the connection, so that the temperature distribution of the connecting piece 4 is uniform, and the temperature of the connecting piece 4 is prevented from rising too high. In the charging and discharging process of the battery 1, the temperature at the connection between the first connecting portion 42 of the other connecting piece 4 and the negative tab of the winding core may locally rise, so that the temperature at this position of the connecting piece 4 is higher than the temperature at other positions of the connecting piece 4. The second heat transfer structure 41 of the connecting piece 4 absorbs the heat at the connection, so that the temperature distribution of the connecting piece 4 is uniform, and the temperature of the connecting piece 4 is prevented from rising too high. In the charging and discharging process of the battery 1, the temperature at the connections between the second connecting portions 43 of the two connecting pieces 4 and the positive post 32 and the negative post 34 may locally rise, so that the temperature at the positions of the positive post 32 and the negative post 34 of the top cover 3 is higher than the temperature at other positions of the top cover 3. The first heat transfer structure 31 of the top cover 3 absorbs the heat at the positions of the positive post 32 and the negative post 34, so that the heat of the positive post 32 and the negative post 34 is transferred to the top cover 3, the temperature of the positive post 32 and the negative post 34 is prevented from rising too high, the positive post 32 and the negative post 34 and the plastic parts at the posts are protected, and the positive post 32 and the negative post 34 are prevented from failing due to the excessively high temperature. The heat is transferred through the first heat transfer structure 31 and the second heat transfer structure 41, the temperature at some positions of the battery 1 is prevented from rising too high, and the battery 1 is protected.
[0030] Specifically, the shell 2 can be a rectangular shell 2, and the first accommodating cavity can be a rectangular cavity. The shell 2 is provided with an opening at the top end. The bottom end of the winding core penetrates through the opening of the shell 2 and is installed in the first accommodating cavity. The positive tab of the winding core is connected to the first connecting portion 42 of one of the connecting pieces 4, and the negative tab is connected to the first connecting portion 42 of the other connecting piece 4. The top portions of the second connecting portions 43 of the two connecting pieces 4 are connected to the bottom portions of the positive post 32 and the negative post 34, respectively. The periphery of the bottom portion of the top cover 3 is connected to the top portion of the shell 2, so that the top cover 3 seals the opening of the shell 2.
[0031] Referring to Figure 1 , 3 , the first heat transfer structure 31 can include a first heat transfer body, a second accommodating cavity 311 provided in the first heat transfer body to accommodate a liquid phase change working medium, and a first injection port 36 provided at the top portion of the first heat transfer body and communicating with the second accommodating cavity 311.
[0032] Specifically, the phase change working medium refers to a substance that can absorb or release a large amount of latent heat during the phase change process. Such a substance changes its physical state without changing the temperature, thereby providing or absorbing a large amount of heat. Phase change working medium plays an important role in heat energy conversion and storage. Common phase change working mediums include molten salt, hydrated salt, paraffin, etc. The first heat transfer body is internally hollow to form a second accommodating cavity 311. Liquid phase change working medium is injected into the second accommodating cavity 311 from a first injection port 36 on the first heat transfer body, so that the first heat transfer structure 31 has good heat absorption effect.
[0033] Specifically, the first heat transfer body can have a rectangular structure. An electrolyte injection port 35, a first mounting hole, a second mounting hole, and a third mounting hole are respectively arranged through the first heat transfer body. The electrolyte injection port 35, the first mounting hole, the second mounting hole, and the third mounting hole of the first heat transfer body are respectively sealed, so that a second accommodating cavity 311 for accommodating liquid phase change working medium is formed inside the first heat transfer body. The positive pole 32 is installed at the first mounting hole of the first heat transfer body, the explosion-proof valve 33 is installed at the second mounting hole of the first heat transfer body, and the negative pole 34 is installed at the third mounting hole of the first heat transfer body.
[0034] Referring to Figure 2 , 4 , 5, the second heat transfer structure 41 can include a second heat transfer body, a third accommodating cavity 411 arranged in the second heat transfer body to accommodate liquid phase change working medium, and a second injection port 44 arranged on the top of the second heat transfer body and communicating with the third accommodating cavity 411.
[0035] Specifically, the second heat transfer body is internally hollow to form a third accommodating cavity 411. Liquid phase change working medium is injected into the third accommodating cavity 411 from a second injection port 44 on the second heat transfer body, so that the second heat transfer structure 41 has good heat absorption effect.
[0036] Specifically, a fourth mounting hole and a fifth mounting hole are respectively arranged through the second heat transfer body. The fourth mounting hole and the fifth mounting hole of the second heat transfer body are respectively sealed, so that a third accommodating cavity 411 for accommodating liquid phase change working medium is formed inside the second heat transfer body. The first connecting part 42 is installed at the fourth mounting hole of the second heat transfer body, and the second connecting part 43 is installed at the fifth mounting hole of the second heat transfer body.
[0037] Specifically, the second heat transfer body is recessed with an arc-shaped notch on one side away from the fifth mounting hole, which can avoid the second heat transfer body from stopping the electrolyte injection port 35, so that the electrolyte can pass through the electrolyte injection port 35 and enter the inside of the shell 2, and the arc-shaped notch provided on the second heat transfer body can reduce the weight of the second heat transfer body; two corners of the second heat transfer body close to the fifth mounting hole can be respectively provided with a rectangular notch, which can also reduce the weight of the second heat transfer body; under the condition of the same thickness, the battery 1 can be reduced in weight, the energy density of the battery 1 can be improved, and the product competitiveness can be improved.
[0038] Referring to Figure 1 、 3 The first heat transfer body can include two first aluminum plates 312.
[0039] Specifically, the two first aluminum plates 312 are arranged in parallel, the edges of the two first aluminum plates 312 are welded or die-cast connected at corresponding positions, the middle parts of the two first aluminum plates 312 are not connected, and a second accommodating cavity 311 is formed between the two first aluminum plates 312; first connecting holes, second connecting holes, third connecting holes, and fourth connecting holes are respectively arranged at corresponding positions of the two first aluminum plates 312, the first connecting holes of the two first aluminum plates 312 are arranged correspondingly, the second connecting holes of the two first aluminum plates 312 are arranged correspondingly, the third connecting holes of the two first aluminum plates 312 are arranged correspondingly, and the fourth connecting holes of the two first aluminum plates 312 are arranged correspondingly; the edges of the first connecting holes of the two first aluminum plates 312 are welded and sealed, so that the electrolyte injection port 35 is formed between the two first aluminum plates 312; the edges of the second connecting holes of the two first aluminum plates 312 are welded and sealed, so that the first mounting hole for mounting the positive pole 32 is formed between the two first aluminum plates 312; the edges of the third connecting holes of the two first aluminum plates 312 are welded and sealed, so that the second mounting hole for mounting the explosion-proof valve 33 is formed between the two first aluminum plates 312; the edges of the fourth connecting holes of the two first aluminum plates 312 are welded and sealed, so that the third mounting hole for mounting the negative pole 34 is formed between the two first aluminum plates 312; the fifth connecting hole is arranged through the top of the upper first aluminum plate 312, so that the first injection port 36 is formed on the first heat transfer body.
[0040] Referring to Figure 2 、 4The second heat transfer body connected to one of the connection pieces 4 of the positive pole post 32 can include two second aluminum plates 412, the edges of which are respectively welded or die-cast connected; the second heat transfer body connected to the other of the connection pieces 4 of the negative pole post 34 includes two first copper plates 413, the edges of which are respectively welded or die-cast connected.
[0041] Specifically, the two second aluminum plates 412 are arranged in parallel, the edges of the two second aluminum plates 412 are welded or die-cast connected at corresponding positions, the middle parts of the two second aluminum plates 412 are not connected, and thus a third accommodation cavity 411 is formed between the two second aluminum plates 412; the sixth connecting hole and the seventh connecting hole are respectively arranged at corresponding positions of the two second aluminum plates 412, the sixth connecting holes of the two second aluminum plates 412 are arranged in correspondence, and the seventh connecting holes of the two second aluminum plates 412 are arranged in correspondence; the edges of the sixth connecting holes of the two second aluminum plates 412 are welded and sealed, so as to form a fourth mounting hole between the two second aluminum plates 412 for mounting the first connecting part 42; the edges of the seventh connecting holes of the two second aluminum plates 412 are welded and sealed, so as to form a fifth mounting hole between the two second aluminum plates 412 for mounting the second connecting part 43; the eighth connecting hole is arranged at the top of the second aluminum plate 412 located above, so as to form a second injection port 44 on the second heat transfer body.
[0042] The first connecting part 42 can be ultrasonically welded to the positive pole lug or the negative pole lug, and the second connecting part 43 is ultrasonically welded to the positive pole post 32 or the negative pole post 34.
[0043] Specifically, the first connecting part 42 and the second connecting part 43 are both solid connecting parts.
[0044] The first connecting part 42 on one of the connection pieces 4 can be a plurality of symmetrically arranged ones, and the winding core includes a plurality of corresponding ones corresponding to the plurality of first connecting parts 42 on the connection piece 4.
[0045] Specifically, when the first connecting part 42 on one of the connection pieces 4 is one symmetrically arranged, one battery includes one winding core and two connection pieces 4, and the positive pole lug and the negative pole lug of the winding core are respectively connected to the first connecting parts 42 of the two connection pieces 4.
[0046] Specifically, the first connecting portion 42 of one connecting sheet 4 can be two, two winding cores and two connecting sheets 4 can be provided in one battery 1, the positive electrode ears of the two winding cores are connected to the two first connecting portions 42 of the first connecting sheet 4 respectively, and the negative electrode ears of the two winding cores are connected to the two first connecting portions 42 of the second connecting sheet respectively. The first connecting portion 42 of one connecting sheet 4 can be three, three winding cores and two connecting sheets 4 can be provided in one battery 1, the positive electrode ears of the three winding cores are connected to the three first connecting portions 42 of the first connecting sheet 4 respectively, and the negative electrode ears of the three winding cores are connected to the three first connecting portions 42 of the second connecting sheet respectively. The first connecting portion 42 of one connecting sheet 4 can be four, four winding cores and two connecting sheets 4 can be provided in one battery 1, the positive electrode ears of the four winding cores are connected to the four first connecting portions 42 of the first connecting sheet 4 respectively, and the negative electrode ears of the four winding cores are connected to the four first connecting portions 42 of the second connecting sheet respectively. The first connecting portion 42 of one connecting sheet 4 can be five, five winding cores and two connecting sheets 4 can be provided in one battery 1, the positive electrode ears of the two winding cores are connected to the five first connecting portions 42 of the first connecting sheet 4 respectively, and the negative electrode ears of the two winding cores are connected to the five first connecting portions 42 of the second connecting sheet respectively. By analogy, when the number of first connecting portions 42 on one connecting sheet 4 exceeds five, the connecting sheet 4 in one battery 1 is also two, the number of winding cores in the battery 1 is equal to the number of first connecting portions 42 on one connecting sheet 4, and the positive electrode ears of the plurality of winding cores are connected to the plurality of first connecting portions 42 of the first connecting sheet 4 respectively, and the negative electrode ears of the plurality of winding cores are connected to the plurality of first connecting portions 42 of the second connecting sheet 4 respectively.
[0047] Referring to Figure 1 , 6 , 7, 8, a battery module, comprising a battery sheet 5 and a battery 1 as described above, the battery sheet 5 comprises a first base body 51, a third heat transfer structure 52 connected to the outer periphery of the first base body 51, and two first positioning holes 511 provided through the first base body 51, and the positive pole 32 or the negative pole 34 of the adjacent two batteries 1 are connected to the two first positioning holes 511 respectively.
[0048] Specifically, the first base body 51 is a solid base body.
[0049] Referring to Figure 6 , 7 , the third heat transfer structure 52 can include a third heat transfer body, a fourth accommodating cavity 521 provided on the inner side of the third heat transfer body for accommodating liquid phase change working medium, and a third inlet 53 provided on the top of the second heat transfer body and communicated with the fourth accommodating cavity 521.
[0050] Specifically, the third heat transfer body is internally hollow to form a fourth accommodating cavity 521, and liquid phase change working medium is injected into the fourth accommodating cavity 521 from the third injection port 53 on the third heat transfer body, so that the third heat transfer structure 52 has good heat absorption effect. The third heat transfer body can have a rectangular structure, and a sixth mounting hole can be formed through the third heat transfer body, and the first base body 51 is mounted at the sixth mounting hole on the third heat transfer body.
[0051] Referring to Figure 6 , 7 The third heat transfer body can include two third aluminum plates 522, and the edges of the two third aluminum plates 522 are respectively welded or die-cast connected.
[0052] Specifically, the two third aluminum plates 522 are arranged in parallel, the edges of the two third aluminum plates 522 are welded or die-cast connected at corresponding positions, the middle parts of the two third aluminum plates 522 are not connected, and the fourth accommodating cavity 521 is formed between the two third aluminum plates 522; a ninth connecting hole is formed through the two third aluminum plates 522 at corresponding positions, and the ninth connecting holes on the two third aluminum plates 522 are correspondingly arranged; the edges of the ninth connecting holes of the two third aluminum plates 522 are welded and sealed, so that the sixth mounting hole is formed between the two third aluminum plates 522.
[0053] Specifically, the second heat transfer body of one connecting piece 4 is made of a copper plate, which can avoid corrosion; the first heat transfer body, the third heat transfer body, and the second heat transfer body of the other connecting piece 4 are made of aluminum plates, which can reduce weight while ensuring strength. The second heat transfer body of the connecting piece 4 connected to the negative pole column 34 is made of a copper plate, and the second heat transfer body of the connecting piece 4 connected to the positive pole column 34 is made of an aluminum plate, and the two are not interchangeable: because the positive potential is high, the copper foil is easily oxidized at high potential, while the oxidation potential of aluminum is high, and the surface layer of the aluminum foil has a dense oxide film, which also has a good protective effect on the internal aluminum; the positive potential is high, and the aluminum thin oxide layer is very dense, which can prevent the current collector from being oxidized, while the copper foil is relatively loose, so as to prevent oxidation, and the potential is relatively low, and Li is difficult to form a lithium intercalation alloy with Cu / nickel at low potential. However, if the copper surface is oxidized, Li will intercalate lithium with oxidized copper at a slightly higher potential, and the aluminum foil cannot be used as the negative electrode and will form a LiAl alloy at low potential. Therefore, the second heat transfer body of the connecting piece 4 connected to the positive pole column 34 is made of an aluminum plate, and the second heat transfer body of the connecting piece 4 connected to the negative pole column 34 is made of a copper plate.
[0054] Specifically, the connecting piece 4, the top cover 3, the winding core and the shell 2 are assembled to form a battery 1. In the process of forming a battery module, the battery tab 5 is connected to the pole of the adjacent two batteries 1. Through the battery module composed of the top cover 3 with the first heat transfer structure 31, the connecting piece 4 with the second heat transfer structure 41, and the battery tab 5 with the third heat transfer structure 52, the heat generated in the welding area during the charging and discharging process can be effectively conducted away, avoiding the temperature of the pole and the welding area being too high, ensuring the temperature consistency of the battery 1 and improving the performance of the battery 1.
[0055] The above-described content can be implemented individually or in various combinations, and these variations are within the scope of protection of the present application.
[0056] It should be noted that in the description of the present application, the terms "upper end", "lower end", "bottom end" indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device containing a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or device including the element.
[0057] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit it. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A battery, characterized by: The application relates to a battery, which comprises a winding core, a top cover (3), two connecting sheets (4) and a shell (2) provided with a top opening; the top cover (3) comprises a positive pole column (32), a negative pole column (34), a first heat transfer structure (31), an explosion-proof valve (33) and an electrolyte injection port (35) penetrating through the first heat transfer structure (31); the positive pole column (32), the negative pole column (34) and the explosion-proof valve (33) are connected to the first heat transfer structure (31) respectively; the connecting sheet (4) comprises a second heat transfer structure (41), a first connecting part (42) and a second connecting part (43) connected to the second heat transfer structure (41) respectively; the inner side of the shell (2) is provided with a first mounting cavity used for accommodating the winding core and communicating with the opening of the shell (2); the positive pole lug of one winding core is connected to the first connecting part (42) of one connecting sheet (4), the negative pole lug is connected to the first connecting part (42) of another connecting sheet (4), and the top portions of the second connecting parts (43) of the two connecting sheets (4) are connected to the bottom portions of the positive pole column (32) and the negative pole column (34) respectively; and the bottom portion of the top cover (3) is connected to the top portion of the shell (2).
2. A battery as claimed in claim 1, characterized in that: The first heat transfer structure (31) comprises a first heat transfer body, a second accommodating cavity (311) used for accommodating liquid phase change working medium and arranged in the first heat transfer body and a first injection port (36) arranged at the top portion of the first heat transfer body and communicating with the second accommodating cavity (311).
3. A battery as claimed in claim 1 or 2, characterised in that: The second heat transfer structure (41) comprises a second heat transfer body, a third accommodating cavity (411) used for accommodating liquid phase change working medium and arranged in the second heat transfer body and a second injection port (44) arranged at the top portion of the second heat transfer body and communicating with the third accommodating cavity (411).
4. A battery as claimed in claim 2, wherein: The first heat transfer body comprises two first aluminum plates (312); the edges of the two first aluminum plates (312) are welded or die-cast connected respectively.
5. A battery as claimed in claim 3, wherein: The second heat transfer body of one connecting sheet (4) connected to the positive pole column (32) comprises two second aluminum plates (412), the edges of the two second aluminum plates (412) are welded or die-cast connected respectively; and the second heat transfer body of another connecting sheet (4) connected to the negative pole column (34) comprises two first copper plates (413), the edges of the two first copper plates (413) are welded or die-cast connected respectively.
6. A battery as claimed in claim 1 or 2, characterised in that: The first connecting part (42) is ultrasonically welded to the positive pole lug or the negative pole lug, and the second connecting part (43) is ultrasonically welded to the positive pole column (32) or the negative pole column (34).
7. A battery as claimed in claim 1 or 2, characterised in that: The first connecting part (42) on one connecting sheet (4) is a plurality of symmetrically arranged ones, and the winding core is a plurality of ones corresponding to the plurality of first connecting parts (42) on the connecting sheet (4).
8. A battery module, characterized by: The battery (1) as claimed in any one of claims 1 to 7, and a battery tab (5) comprising a first base body (51), a third heat transfer structure (52) connected to the periphery of the first base body (51), and two first positioning holes (511) provided through the first base body (51), wherein the positive pole (32) or the negative pole (34) of two adjacent battery (1) are respectively connected to the two first positioning holes (511).
9. A battery module as claimed in claim 8, wherein: The third heat transfer structure (52) comprises a third heat transfer body, a fourth accommodating cavity (521) arranged on the inner side of the third heat transfer body for accommodating a liquid phase change working medium, and a third injection inlet (53) arranged on the top of the second heat transfer body and communicated with the fourth accommodating cavity (521).
10. The battery module of claim 9, wherein: The third heat transfer body comprises two third aluminum plates (522), and the edges of the two third aluminum plates (522) are respectively welded or die-cast connected.