Battery cell structure and battery

Abstract

The utility model provides a kind of electric core structure and battery.The electric core structure includes: first adapter piece;Second adapter piece;Roll core, along the length direction of roll core, the opposite ends of the top of roll core are respectively provided with positive lug and negative lug;Cover plate, cover plate is provided with positive column and negative column, positive lug and first adapter piece form plane contact, positive lug is connected with positive column by first adapter piece, negative lug and second adapter piece form plane contact, negative lug is connected with negative column by second adapter piece;First heat conduction part, it is arranged between first adapter piece and cover plate, first adapter piece and cover plate are all with first heat conduction part form plane contact;Second heat conduction part, it is arranged between second adapter piece and cover plate, second adapter piece and cover plate are all with second heat conduction part form plane contact.The utility model technical scheme, can solve the problem of lower heat dissipation efficiency of prior art electric core.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a cell structure and a battery. Background Technology

[0002] With the rapid development of the electric vehicle and portable electronics markets, consumer demand for fast-charging capabilities is increasing. The widespread adoption of fast-charging technology means that batteries need to withstand greater current in a shorter time, generating more heat. Excessive temperature not only reduces battery performance but also shortens battery life and can even cause safety issues. Therefore, effective battery thermal management systems have become an important direction in battery technology research. One traditional battery cooling method is to cool the top of the cell, which aims to directly remove heat from the hottest area of ​​the cell, thereby suppressing temperature rise.

[0003] like Figure 8 and Figure 9 As shown, the adapter structure 205 of the prior art battery cell 200 includes a concave plate structure 204 and a cylindrical structure 203 disposed on the concave plate structure 204. The cylindrical structure 203 is connected to the electrode post. The concave plate structure 204 includes two connecting parts 2041, which are connected to the electrode tabs. The heat transfer path of the prior art battery cell 200 is as follows: heat is transferred through the electrode tabs of the core to the connecting parts 2041, and then through the connecting parts 2041 to the cylindrical structure 203. Then, the heat is transferred vertically through the cylindrical structure 203 to the electrode post, and then through the electrode post to the busbar 202 and finally to the cold plate 201. As can be seen from the above, in the process of heat transfer from the tab to the adapter structure in the prior art battery cell 200, the heat is first transferred horizontally to the connecting part 2041, and then vertically from the connecting part 2041 to the cylindrical structure 203, and then vertically from the cylindrical structure 203 to the electrode. The heat transfer path is relatively long and the contact area between the cylindrical structure and the electrode is relatively small, resulting in low heat dissipation efficiency of the prior art battery cell. Utility Model Content

[0004] The main objective of this invention is to provide a cell structure and battery that can solve the problem of low heat dissipation efficiency of existing cells.

[0005] To achieve the above objectives, according to one aspect of the present invention, a battery cell structure is provided, comprising: a first adapter piece; a second adapter piece; a core, wherein a positive electrode tab and a negative electrode tab are respectively provided at opposite ends of the top of the core along the length direction of the core; a cover plate, wherein a positive electrode post and a negative electrode post are provided on the cover plate, the positive electrode tab forming planar contact with the first adapter piece, the positive electrode tab being electrically connected to the positive electrode post through the first adapter piece, the negative electrode tab forming planar contact with the second adapter piece, the negative electrode tab being electrically connected to the negative electrode post through the second adapter piece, the positive electrode tab, the negative electrode post, and the negative electrode post being arranged at intervals along the length direction of the core; a first heat-conducting part, disposed between the first adapter piece and the cover plate, wherein both the first adapter piece and the cover plate form planar contact with the first heat-conducting part, and the first heat-conducting part and the cover plate form an insulating contact; and a second heat-conducting part, disposed between the second adapter piece and the cover plate, wherein both the second adapter piece and the cover plate form planar contact with the second heat-conducting part, and the second heat-conducting part and the cover plate form an insulating contact.

[0006] Furthermore, the first adapter includes a first adapter segment and a second adapter segment electrically connected. The first adapter segment is located between the positive electrode tab and the first heat-conducting part. The top of the first adapter segment forms a planar contact with the first heat-conducting part, and the bottom of the first adapter segment forms a planar contact with and is electrically connected to the positive electrode tab. The second adapter segment is located between the winding core and the positive electrode post. The second adapter segment forms a planar contact with and is electrically connected to the positive electrode post. The second adapter includes a third adapter segment and a fourth adapter segment electrically connected. The third adapter segment is located between the negative electrode tab and the second heat-conducting part. The top of the third adapter segment forms a planar contact with the second heat-conducting part, and the bottom of the third adapter segment forms a planar contact with and is electrically connected to the negative electrode tab. The fourth adapter segment is located between the winding core and the negative electrode post. The fourth adapter segment forms a planar contact with and is electrically connected to the negative electrode post.

[0007] Furthermore, there are at least two cores, which are arranged along the width of the cover plate. The first transition section includes at least two first transition parts, which are electrically connected to at least two positive tabs in a one-to-one correspondence. The third transition section includes at least two second transition parts, which are electrically connected to at least two negative tabs in a one-to-one correspondence.

[0008] Furthermore, the first adapter piece also includes a first inclined section, which is parallel to the second adapter section and spaced apart along the height direction of the core. One end of the first inclined section is connected to the first adapter section, and the other end of the first inclined section is connected to the second adapter section. The second adapter piece also includes a second inclined section, which is parallel to the third adapter section and spaced apart along the height direction of the core. One end of the second inclined section is connected to the third adapter section, and the other end of the second inclined section is connected to the fourth adapter section.

[0009] Furthermore, both the first and second heat-conducting parts are made of insulating materials.

[0010] Furthermore, the projection along the height direction of the core is made so that the projection of the cover plate completely covers the projections of the first adapter piece, the second adapter piece, the first heat-conducting part, and the second heat-conducting part.

[0011] Furthermore, both the positive and negative terminals are located between the positive and negative tabs; or, both the positive and negative tabs are located between the positive and negative terminals.

[0012] According to another aspect of the present invention, a battery is provided, comprising: a cell structure as described above; a housing, the housing including a mounting cavity and an opening communicating with the mounting cavity, the cell structure being mounted in the mounting cavity through the opening, and a cover plate being disposed on the opening and sealingly engaging with the opening.

[0013] Furthermore, the battery also includes a first heat exchanger and a second heat exchanger. Both the first heat exchanger and the second heat exchanger are located on the side of the cover plate away from the core and can form a thermally conductive fit with the cover plate. The first heat exchanger is correspondingly arranged with the first thermally conductive part, and the second heat exchanger is correspondingly arranged with the second thermally conductive part.

[0014] Furthermore, when projecting along the height direction of the core, the projection of the first heat exchanger covers the projection of the corresponding first heat-conducting part, and the projection of the second heat exchanger covers the projection of the corresponding second heat-conducting part.

[0015] By applying the technical solution of this utility model, the positive electrode tab and the first adapter piece, the first adapter piece and the first heat-conducting part, and the first heat-conducting part and the cover plate are all in planar contact; similarly, the negative electrode tab and the second adapter piece, the second adapter piece and the second heat-conducting part, and the second heat-conducting part and the cover plate are all in planar contact. This significantly increases the heat-conducting area. Furthermore, the arrangement of the first and second heat-conducting parts allows heat to be directly transferred from the adapter pieces (first and second adapter pieces) to the cover plate, and then to the external thermal management device (such as a liquid cooling plate), without needing to pass through the electrode post and conductor busbar before reaching the cold plate. This enables more efficient heat transfer within the cell structure, thereby improving its heat dissipation efficiency. The cell structure of this application shortens the heat transfer path and increases the heat-conducting area, allowing the liquid cooling plate to exchange heat with the cell structure more efficiently. Additionally, the conductive components of this application do not directly contact the liquid cooling plate, resulting in higher insulation reliability. Attached Figure Description

[0016] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1 An exploded view of the cell structure of one embodiment of the present invention is shown;

[0018] Figure 2 An exploded view of the cell structure of one embodiment of the present invention is shown;

[0019] Figure 3 A schematic diagram of the battery cell structure according to an embodiment of the present invention is shown;

[0020] Figure 4 A schematic diagram of the battery cell structure according to an embodiment of the present invention is shown;

[0021] Figure 5 It shows Figure 4 AA section view;

[0022] Figure 6 It shows Figure 5 Enlarged view of point B;

[0023] Figure 7 A schematic diagram of the structure of a battery according to an embodiment of the present invention is shown;

[0024] Figure 8 A schematic diagram of the structure of a prior art battery cell is shown;

[0025] Figure 9 A schematic diagram of the existing battery cell's adapter structure is shown.

[0026] The above figures include the following reference numerals:

[0027] 10. First adapter piece; 11. First adapter section; 111. First adapter split body; 12. Second adapter section; 13. First inclined section; 20. Second adapter piece; 21. Third adapter section; 211. Second adapter split body; 22. Fourth adapter section; 23. Second inclined section; 30. Core; 31. Positive electrode tab; 32. Negative electrode tab; 40. Cover plate; 41. Positive electrode post; 42. Negative electrode post; 50. First heat-conducting part; 60. Second heat-conducting part; 70. First heat exchanger; 80. Second heat exchanger; 90. Shell; 100. Conductive component; 200. Existing battery cell; 201. Cold plate; 202. Conductive busbar; 203. Cylindrical structure; 204. Concave plate structure; 2041. Connecting part; 205. Adapter structure. Detailed Implementation

[0028] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] like Figure 8The diagram shows a schematic of a prior art battery cell 200. The prior art battery cell 200 includes a top cover, a cold plate 201, a conductive bus 202, and a connecting structure 205. A positive terminal and a negative terminal are disposed on the top cover. The tabs of the prior art battery cell 200 are electrically connected to the positive or negative terminal on the top cover via the connecting structure 205. Figure 9 The diagram shows a schematic of the adapter structure 205 of the prior art battery cell 200. The adapter structure 205 includes a concave plate structure 204 and a cylindrical structure 203. The cylindrical structure 203 is disposed on the concave plate structure 204. The concave plate structure 204 also includes two connecting parts 2041, which are connected to the tabs. The cylindrical structure 203 is electrically connected to the positive or negative terminal. The heat transfer path of the prior art battery cell 200 is as follows: the heat of the prior art battery cell 200 is transferred to the connecting parts through the tabs, then transferred horizontally through the connecting parts 2041 to the cylindrical structure 203, then transferred vertically through the cylindrical structure 203 to the positive or negative terminal, then transferred to the busbar 202 through the positive or negative terminal, and finally transferred to the cold plate 201 through the busbar 202. As can be seen from the above, the heat transfer path of the existing battery cell is relatively long and the contact area between the cylindrical structure 203 and the positive or negative terminal is relatively small, which ultimately leads to the low heat dissipation efficiency of the existing battery cell 200.

[0030] To solve the above problems, see [reference] Figures 1 to 7 As shown, this utility model provides a battery cell structure, which includes: a first adapter piece 10; a second adapter piece 20; a core 30, with a positive electrode tab 31 and a negative electrode tab 32 respectively provided at opposite ends of the top of the core 30 along its length; and a cover plate 40, on which a positive electrode post 41 and a negative electrode post 42 are provided. The positive electrode tab 31 forms a planar contact with the first adapter piece 10 and is electrically connected to the positive electrode post 41 through the first adapter piece 10. The negative electrode tab 32 forms a planar contact with the second adapter piece 20 and is connected to the negative electrode post 42 through the second adapter piece 20. Electrical connections are provided along the length of the core 30, with positive electrode tab 31, negative electrode tab 32, positive electrode post 41, and negative electrode post 42 arranged at intervals; a first heat-conducting part 50 is disposed between the first adapter piece 10 and the cover plate 40, both the first adapter piece 10 and the cover plate 40 forming planar contact with the first heat-conducting part 50, and the first heat-conducting part 50 forming an insulating contact with the cover plate 40; a second heat-conducting part 60 is disposed between the second adapter piece 20 and the cover plate 40, both the second adapter piece 20 and the cover plate 40 forming planar contact with the second heat-conducting part 60, and the second heat-conducting part 60 forming an insulating contact with the cover plate 40.

[0031] In this embodiment, along the length of the core 30, a positive electrode tab 31 and a negative electrode tab 32 are respectively provided at opposite ends of the top of the core 30. That is, a positive electrode tab 31 is provided at one end of the top of the core 30, and a negative electrode tab 32 is provided at the other end. The positive electrode tab 31 forms a planar contact with the bottom surface of the first adapter piece 10, the top surface of the first adapter piece 10 forms a planar contact with the bottom surface of the first heat-conducting part 50, the top surface of the first heat-conducting part 50 forms a planar contact with the bottom surface of the cover plate 40, the negative electrode tab 32 forms a planar contact with the bottom surface of the second adapter piece 20, the bottom surface of the second adapter piece 20 forms a planar contact with the bottom surface of the second heat-conducting part 60, and the top surface of the second heat-conducting part 60 forms a planar contact with the bottom surface of the cover plate 40. The heat transfer path of the battery cell structure is as follows: part of the heat of the battery cell structure is transferred to the first adapter plate 10 through the positive electrode 31, then to the first heat-conducting part 50 through the first adapter plate 10, then to the cover plate 40 through the first heat-conducting part 50, and then to the external thermal management device (such as a liquid cooling plate). The other part of the heat of the battery cell structure is transferred to the second adapter plate 20 through the negative electrode 32, then to the second heat-conducting part 60 through the second adapter plate 20, then to the cover plate 40 through the second heat-conducting part 60, and then to the external thermal management device (such as a liquid cooling plate).

[0032] As can be seen from the above, compared with the prior art, the heat transfer path of this application is shorter. Furthermore, in this application, the positive electrode tab 31 and the first adapter piece 10, the first adapter piece 10 and the first heat-conducting part 50, and the first heat-conducting part 50 and the cover plate 40 are all in planar contact. Similarly, the negative electrode tab 32 and the second adapter piece 20, the second adapter piece 20 and the second heat-conducting part 60, and the second heat-conducting part 60 and the cover plate 40 are all in planar contact. This significantly increases the heat-conducting area. At the same time, the arrangement of the first heat-conducting part 50 and the second heat-conducting part 60 allows heat to be directly transferred from the adapter pieces (first adapter piece 10 and second adapter piece 20) to the cover plate 40, and then to the external thermal management device (such as a liquid cooling plate), without having to pass through the electrode post and the busbar before being transferred to the cold plate. This allows the heat of the cell structure to be transferred more efficiently, thereby improving the heat dissipation efficiency of the cell structure.

[0033] It should be noted that in this application, a portion of the first adapter piece 10 is electrically connected to the positive terminal 41, and another portion of the first adapter piece 10 forms a planar contact with the first heat-conducting part 50. A portion of the second adapter piece 20 is electrically connected to the negative terminal 42, and another portion of the second adapter piece 20 forms a planar contact with the second heat-conducting part 60.

[0034] See also Figures 1 to 7As shown, in one embodiment of the present invention, the first adapter piece 10 includes a first adapter segment 11 and a second adapter segment 12 electrically connected. The first adapter segment 11 is located between the positive electrode tab 31 and the first heat-conducting part 50. The top of the first adapter segment 11 forms a planar contact with the first heat-conducting part 50, and the bottom of the first adapter segment 11 forms a planar contact with and is electrically connected to the positive electrode tab 31. The second adapter segment 12 is located between the winding core 30 and the positive electrode post 41, and the second adapter segment 12 forms a planar contact with the positive electrode post 41. The second adapter piece 20 includes a third adapter segment 21 and a fourth adapter segment 22 that are electrically connected. The third adapter segment 21 is located between the negative electrode tab 32 and the second heat-conducting part 60. The top of the third adapter segment 21 forms a planar contact with the second heat-conducting part 60, and the bottom of the third adapter segment 21 forms a planar contact with the negative electrode tab 32 and is electrically connected. The fourth adapter segment 22 is located between the winding core 30 and the negative electrode post 42. The fourth adapter segment 22 forms a planar contact with the negative electrode post 42 and is electrically connected.

[0035] In this embodiment, the bottom of the first transition section 11 forms a planar contact with the positive electrode tab 31, and the top of the first transition section 11 forms a planar contact with the first heat-conducting part 50. The bottom of the third transition section 21 forms a planar contact with the negative electrode tab 32, and the top of the third transition section 21 forms a planar contact with the second heat-conducting part 60. Compared with point contact or line contact, planar contact can significantly increase the heat-conducting area, thereby reducing thermal resistance. This allows the heat generated by the battery cell to be transferred to the heat-conducting part more quickly, and then the heat can be rapidly transferred from the battery cell structure to the external thermal management device (such as a liquid cooling plate), improving the heat dissipation efficiency of the battery cell structure and the cooling effect of the thermal management device (such as a liquid cooling plate). The second transition section 12 and the fourth transition section 22 form planar contacts with the positive electrode post 41 and the negative electrode post 42, respectively, and are electrically connected, ensuring a stable electrical connection between the battery cell structure and the external circuit.

[0036] See also Figures 1 to 7 As shown, in one embodiment of the present invention, there are at least two cores 30, which are arranged along the width direction of the cover plate 40. The first transition section 11 includes at least two first transition parts 111, which are electrically connected to at least two positive tabs 31 in a one-to-one correspondence. The third transition section 21 includes at least two second transition parts 211, which are electrically connected to at least two negative tabs 32 in a one-to-one correspondence.

[0037] The above configuration facilitates the connection between the first adapter 111 and the corresponding positive tab 31, and the connection between the second adapter 211 and the corresponding negative tab 32. It also enables the establishment of a stable electrical connection between the first adapter 111 and the corresponding positive tab 31, and between the second adapter 211 and the corresponding negative tab 32.

[0038] See also Figures 1 to 7 As shown, in one embodiment of the present invention, the first adapter piece 10 further includes a first inclined segment 13. The first adapter segment 11 and the second adapter segment 12 are parallel and spaced apart along the height direction of the core 30. One end of the first inclined segment 13 is connected to the first adapter segment 11, and the other end of the first inclined segment 13 is connected to the second adapter segment 12. The second adapter piece 20 further includes a second inclined segment 23. The third adapter segment 21 and the fourth adapter segment 22 are parallel and spaced apart along the height direction of the core 30. One end of the second inclined segment 23 is connected to the third adapter segment 21, and the other end of the second inclined segment 23 is connected to the fourth adapter segment 22.

[0039] In this embodiment, the first transition section 11 is located above the second transition section 12. Since the positive electrode tab 31 has a certain thickness, the arrangement of the first inclined section 13 allows the bottom surface of the first transition section 11 to form a planar contact with the positive electrode tab 31, and the bottom surface of the second transition section 12 to form a planar contact with the upper end surface of the cell structure. The third transition section 21 is located above the fourth transition section 22. Since the negative electrode tab 32 has a certain thickness, the arrangement of the second inclined section 23 allows the bottom surface of the third transition section 21 to form a planar contact with the negative electrode tab 32, and the bottom surface of the fourth transition section 22 to form a planar contact with the upper end surface of the cell structure. At the same time, the above arrangement can also effectively utilize the top space of the cell structure, making the structure more compact and improving space utilization.

[0040] In one embodiment of this utility model, both the first heat-conducting part 50 and the second heat-conducting part 60 are made of insulating material.

[0041] Through the above settings, insulating contact can be achieved between the first heat-conducting part 50 and the cover plate 40, and between the second heat-conducting part 60 and the cover plate 40, avoiding conductive contact between the first heat-conducting part 50 and the second heat-conducting part 60 and the cover plate 40, thereby ensuring the electrical safety of the cell structure.

[0042] In one embodiment, the insulating material can be polyurethane, silicone, or a thermally conductive adhesive such as epoxy resin.

[0043] In one embodiment of this utility model, the first heat-conducting part 50 and the second heat-conducting part 60 are both made of metal materials (such as copper, aluminum or alloys containing them), and an insulating layer is provided on the side of the cover plate facing the first heat-conducting part and the second heat-conducting part, so that an insulating contact is formed between the first heat-conducting part and the cover plate, and an insulating contact is formed between the second heat-conducting part and the cover plate.

[0044] In one embodiment, both the first heat-conducting part 50 and the second heat-conducting part 60 are made of at least one of graphite sheet, graphene, carbon fiber material, ceramic material, and phase change material.

[0045] See also Figures 1 to 7 As shown, in one embodiment of the present invention, the projection of the cover plate 40 along the height direction of the core 30 completely covers the projections of the first adapter piece 10, the second adapter piece 20, the first heat-conducting part 50, and the second heat-conducting part 60.

[0046] Through the above configuration, the cover plate 40 can provide physical protection for the first adapter plate 10, the second adapter plate 20, the first heat-conducting part 50, and the second heat-conducting part 60, preventing external impacts or pressures from directly acting on the adapter plate and the heat-conducting part, thereby extending the service life of the battery cell structure.

[0047] like Figure 1 As shown, in one embodiment of the present invention, the positive electrode post 41 and the negative electrode post 42 are both located between the positive electrode tab 31 and the negative electrode tab 32.

[0048] In this embodiment, the positive electrode tab 31, the positive electrode post 41, the negative electrode post 42 and the negative electrode tab 32 are arranged at intervals along the length direction of the core 30, so that the positive electrode tab 31 can be electrically connected to the positive electrode post 41 through a part of the first adapter piece 10, and the negative electrode tab 32 can be electrically connected to the negative electrode post 42 through a part of the second adapter piece 20.

[0049] like Figure 2 As shown, in one embodiment of the present invention, the positive electrode tab 31 and the negative electrode tab 32 are both located between the positive electrode post 41 and the negative electrode post 42.

[0050] In this embodiment, the positive electrode post 41, positive electrode tab 31, negative electrode tab 32, and negative electrode post 42 are arranged at intervals along the length of the core 30. This arrangement allows the positive electrode tab 31 to be electrically connected to the positive electrode post 41 via a portion of the first adapter piece 10, and also allows the negative electrode tab 32 to be electrically connected to the negative electrode post 42 via a portion of the second adapter piece 20. The positive electrode tab 31 and negative electrode tab 32 are positioned relatively centrally relative to the core 30, resulting in better heat transfer uniformity of the battery cell structure.

[0051] See also Figures 1 to 7 As shown, according to another aspect of the present invention, a battery is also provided, comprising: a cell structure as described above; a housing 90, the housing 90 including a mounting cavity and an opening communicating with the mounting cavity, the cell structure being mounted in the mounting cavity through the opening, and a cover plate 40 covering the opening and sealingly engaging with the opening.

[0052] In this embodiment, the battery cell structure has all the technical solutions and effects of the above-mentioned cell structure, which will not be repeated here.

[0053] See also Figures 1 to 7As shown, in one embodiment of the present invention, the battery further includes a first heat exchanger 70 and a second heat exchanger 80. Both the first heat exchanger 70 and the second heat exchanger 80 are located on the side of the cover plate 40 away from the core 30 and can form a thermally conductive fit with the cover plate 40. The first heat exchanger 70 is correspondingly disposed with the first thermally conductive part 50, and the second heat exchanger 80 is correspondingly disposed with the second thermally conductive part 60.

[0054] With the above configuration, when cooling of the battery cell structure is required, a portion of the heat from the core 30 can be transferred to the cover plate 40 via the first heat-conducting part 50 and then rapidly transferred to the first heat exchanger 70; another portion of the heat from the core 30 can be transferred to the cover plate 40 via the second heat-conducting part 60 and then rapidly transferred to the second heat exchanger 80, thereby improving the cooling effect of the first and second heat exchangers 70 and 80 on the battery cell structure. Conversely, when heating of the battery cell structure is required, the heat from the first and second heat exchangers 70 and 80 can be quickly transferred to the battery cell structure, thereby improving the heating effect of the first and second heat exchangers 70 and 80 on the battery cell structure.

[0055] See also Figures 1 to 7 As shown, in one embodiment of the present invention, the projection along the height direction of the core 30 covers the projection of the first heat exchanger 70 and the projection of the corresponding first heat-conducting part 50, and the projection of the second heat exchanger 80 covers the projection of the corresponding second heat-conducting part 60.

[0056] The above settings ensure the contact area between the first heat exchanger 70 and the second heat exchanger 80 and the cover plate 40, thereby ensuring the cooling effect or heating rate of the first heat exchanger 70 and the second heat exchanger 80 on the battery cell structure.

[0057] See also Figures 1 to 7 As shown, in one embodiment of the present invention, the battery further includes two conductive elements 100, one of which is conductively connected to the positive terminal 41, and the other is conductively connected to the negative terminal 42.

[0058] In one embodiment, both the first heat exchanger 70 and the second heat exchanger 80 are prior art liquid cooling plates.

[0059] As can be seen from the above description, the above embodiments of this utility model achieve the following technical effects: the positive electrode tab and the first adapter piece, the first adapter piece and the first heat-conducting part, and the first heat-conducting part and the cover plate are all in planar contact; the negative electrode tab and the second adapter piece, the second adapter piece and the second heat-conducting part, and the second heat-conducting part and the cover plate are all in planar contact. In this way, the heat conduction area can be greatly increased. At the same time, the arrangement of the first heat-conducting part and the second heat-conducting part allows heat to be directly transferred from the adapter piece (the first adapter piece and the second adapter piece) to the cover plate, and then to the external thermal management device (such as the liquid cooling plate), without having to pass through the electrode post and the busbar in sequence before being transferred to the cold plate. This allows the heat of the cell structure to be transferred more efficiently, thereby improving the heat dissipation efficiency of the cell structure.

[0060] Obviously, the embodiments described above are merely some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. It should be noted that the terminology used herein is for describing specific implementations only and is not intended to limit the exemplary implementations according to this application. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. The above descriptions are merely preferred embodiments of this utility model and are not intended to limit this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery cell structure, characterized in that, include: First adapter plate (10); Second adapter plate (20); The core (30) has a positive electrode tab (31) and a negative electrode tab (32) respectively provided at opposite ends of the top of the core (30) along the length direction of the core (30). A cover plate (40) is provided with a positive terminal (41) and a negative terminal (42). The positive terminal (31) forms a planar contact with the first adapter plate (10). The positive terminal (31) is electrically connected to the positive terminal (41) through the first adapter plate (10). The negative terminal (32) forms a planar contact with the second adapter plate (20). The negative terminal (32) is electrically connected to the negative terminal (42) through the second adapter plate (20). Along the length direction of the core (30), the positive terminal (31), the negative terminal (32), the positive terminal (41), and the negative terminal (42) are arranged at intervals. A first heat-conducting part (50) is disposed between the first adapter piece (10) and the cover plate (40). Both the first adapter piece (10) and the cover plate (40) form a planar contact with the first heat-conducting part (50), and the first heat-conducting part (50) and the cover plate (40) form an insulating contact. The second heat-conducting part (60) is disposed between the second adapter piece (20) and the cover plate (40). Both the second adapter piece (20) and the cover plate (40) form a planar contact with the second heat-conducting part (60), and the second heat-conducting part (60) and the cover plate (40) form an insulating contact.

2. The cell structure according to claim 1, characterized in that, The first adapter piece (10) includes a first adapter segment (11) and a second adapter segment (12) that are electrically connected. The first adapter segment (11) is located between the positive electrode tab (31) and the first heat-conducting part (50). The top of the first adapter segment (11) forms a planar contact with the first heat-conducting part (50), and the bottom of the first adapter segment (11) forms a planar contact with and is electrically connected to the positive electrode tab (31). The second adapter segment (12) is located between the winding core (30) and the positive electrode post (41). The second adapter segment (12) forms a planar contact with and is electrically connected to the positive electrode post (41). The second adapter piece (20) includes a third adapter segment (21) and a fourth adapter segment (22) that are electrically connected. The third adapter segment (21) is located between the negative electrode tab (32) and the second heat-conducting part (60). The top of the third adapter segment (21) forms a planar contact with the second heat-conducting part (60), and the bottom of the third adapter segment (21) forms a planar contact with the negative electrode tab (32) and is electrically connected. The fourth adapter segment (22) is located between the core (30) and the negative electrode post (42). The fourth adapter segment (22) forms a planar contact with the negative electrode post (42) and is electrically connected.

3. The cell structure according to claim 2, characterized in that, The winding core (30) is at least two, and the at least two winding cores (30) are arranged along the width direction of the cover plate (40). The first transition section (11) includes at least two first transition parts (111), and the at least two first transition parts (111) are electrically connected to at least two positive tabs (31) in a one-to-one correspondence. The third transition section (21) includes at least two second transition parts (211), and the at least two second transition parts (211) are electrically connected to at least two negative tabs (32) in a one-to-one correspondence.

4. The cell structure according to claim 2, characterized in that, The first adapter piece (10) further includes a first inclined section (13), the first adapter section (11) and the second adapter section (12) are parallel and spaced apart along the height direction of the core (30), one end of the first inclined section (13) is connected to the first adapter section (11), and the other end of the first inclined section (13) is connected to the second adapter section (12). The second adapter piece (20) further includes a second inclined section (23), the third adapter section (21) and the fourth adapter section (22) are parallel and spaced apart along the height direction of the core (30), one end of the second inclined section (23) is connected to the third adapter section (21), and the other end of the second inclined section (23) is connected to the fourth adapter section (22).

5. The cell structure according to any one of claims 1 to 3, characterized in that, Both the first heat-conducting part (50) and the second heat-conducting part (60) are made of insulating material.

6. The cell structure according to any one of claims 1 to 3, characterized in that, Projecting along the height direction of the core (30), the projection of the cover plate (40) completely covers the projections of the first adapter piece (10), the second adapter piece (20), the first heat-conducting part (50), and the second heat-conducting part (60).

7. The cell structure according to any one of claims 1 to 3, characterized in that, The positive electrode post (41) and the negative electrode post (42) are both located between the positive electrode tab (31) and the negative electrode tab (32); or, the positive electrode tab (31) and the negative electrode tab (32) are both located between the positive electrode post (41) and the negative electrode post (42).

8. A battery, characterized in that, include: The cell structure as described in any one of claims 1 to 7; The housing (90) includes a mounting cavity and an opening communicating with the mounting cavity. The cell structure is mounted in the mounting cavity through the opening. The cover plate (40) covers the opening and seals with the opening.

9. The battery according to claim 8, characterized in that, The battery also includes a first heat exchanger (70) and a second heat exchanger (80). The first heat exchanger (70) and the second heat exchanger (80) are both located on the side of the cover plate (40) away from the core (30) and can both form a thermally conductive fit with the cover plate (40). The first heat exchanger (70) is correspondingly disposed with the first thermally conductive part (50), and the second heat exchanger (80) is correspondingly disposed with the second thermally conductive part (60).

10. The battery according to claim 9, characterized in that, Projecting along the height direction of the core (30), the projection of the first heat exchanger (70) covers the projection of the corresponding first heat-conducting part (50), and the projection of the second heat exchanger (80) covers the projection of the corresponding second heat-conducting part (60).

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