Battery cell assembly and battery

Abstract

The utility model relates to a battery cell assembly and a battery, the battery cell assembly comprises: a plurality of battery cells arranged in an array, each battery cell having a pole; an assembling groove is formed in at least one pole of each battery cell; the fixing piece is arranged in the assembling groove, and the side wall of the assembling groove abuts against the fixing piece to limit the fixing piece; the temperature sensor is arranged in the fixing piece and is used for detecting the temperature of the pole; the sheet is electrically connected with the pole columns of the two adjacent battery cells, so that the two adjacent battery cells are connected in series or in parallel, and the fixing parts are arranged between the pole columns and the sheet in a limiting manner. The temperature sensor located in the assembling groove obtains the temperature of the battery cell by detecting the temperature of the pole, compared with the mode that the temperature of the battery cell is indirectly obtained through middle parts such as a nickel sheet and a bar sheet in the prior art, the temperature detected by the temperature sensor is the actual temperature of the battery cell, and the testing accuracy is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cell assembly and a battery. Background Art

[0002] With the rapid expansion and development of the new energy market, the market share of new energy vehicles has gradually increased. As a result, people's requirements for the core components of new energy vehicles - power batteries - are also becoming higher and higher. Among them, the safety and stability of power batteries occupy a major position.

[0003] In order to ensure the safe and stable operation of power batteries, the temperature of their battery cells needs to be continuously monitored. However, in traditional technology, the method of testing the battery cell temperature is as follows: the temperature test point is welded on the nickel sheet, and then the nickel sheet is welded on the bar sheet, and the bar sheet is welded to the battery cell pole. In this way, the temperature of the battery cell pole is indirectly obtained through the nickel sheet and the bar sheet. However, this method does not directly test the temperature of the battery cell, and there are many intermediate components, which leads to deviations from the actual temperature of the battery cell and low test accuracy. Utility Model Content

[0004] Based on this, it is necessary to provide a battery cell assembly and a battery that can improve the above problems.

[0005] A battery cell assembly, comprising:

[0006] A plurality of battery cells are arranged in an array, each of the battery cells has a pole; at least one pole of each battery cell has an assembly groove;

[0007] A fixing member is disposed in the assembly groove, wherein a side wall of the assembly groove abuts against the fixing member to limit the fixing member;

[0008] a temperature sensor, disposed in the fixing member, for detecting the temperature of the pole; and

[0009] The bar is electrically connected to the poles of two adjacent battery cells so that the two adjacent battery cells are connected in series or in parallel, and the fixing member is limitedly provided between the pole and the bar.

[0010] In one embodiment, the tab is provided with a through hole communicating with the assembly groove, and the output line of the temperature sensor is led out through the through hole.

[0011] In one embodiment, the center point of the assembly groove and the through hole are located on the same axis, and the diameter of the through hole is smaller than the diameter of the assembly groove;

[0012] The fixing member can be elastically deformed to switch between a compressed state and an extended state; when the fixing member is in the compressed state, the fixing member can be installed in the assembly groove through the through hole; when the fixing member is in the extended state, the fixing member is against the side wall of the assembly groove and is limited in the assembly groove by the tab.

[0013] In one embodiment, the fixing member includes an annular portion, the temperature sensor is mounted in the annular portion, the annular portion has a first notch, and the fixing member can be elastically deformed through the first notch to switch between the compressed state and the extended state;

[0014] When the fixing member is in the extended state, the annular portion abuts against the side wall of the assembly groove, and the annular portion is limitedly disposed between the pole and the tab along its axial direction.

[0015] In one embodiment, the fixing member further includes a clamp, the clamp is located in the annular portion, and the temperature sensor is installed in the clamp;

[0016] The clamp has a second notch, and the temperature sensor can be inserted into the clamp through one end of the clamp. The clamp can be elastically deformed through the second notch to clamp the temperature sensor.

[0017] In one embodiment, the fixing member further includes two oppositely arranged clamping portions provided in the annular portion, the clamping portions having a through clamping hole, and the two clamping holes are configured to allow two clamping claws of the clamping mechanism to extend into and operate the annular portion, so that the fixing member switches from an extended state to a compressed state.

[0018] In one embodiment, one end of the annular portion close to the tab and the positions corresponding to the clamping portion and the clamp abut against the tab, and the remaining portion forms a missing portion;

[0019] and / or

[0020] The clamp and the clamping portion are both in contact with the tab, and a side of the clamp away from the tab is recessed in the annular portion to form a groove, and the bottom of the temperature sensor is accommodated in the groove.

[0021] In one embodiment, a limiting post is protruded from the clamp, and an end of the temperature sensor close to the tab abuts against the limiting post to be isolated from the tab;

[0022] or

[0023] The battery cell assembly further includes a thermal insulation pad, which is arranged between the temperature sensor and the bar.

[0024] In one embodiment, the battery cell assembly further includes a thermal pad, which is interferingly disposed between the pole and the temperature sensor to transfer the temperature of the pole to the temperature sensor.

[0025] A battery comprises the above-mentioned battery cell assembly.

[0026] In the above-mentioned cell assembly and battery, because the fixing member contacts the sidewalls of the assembly slot, the sidewalls of the assembly slot limit the fixing member in the radial direction of the pole. At the same time, because the fixing member limit is located between the pole and the tab, the pole and the tab cooperate to limit the fixing member in the axial direction of the pole. That is, the bottom wall of the assembly slot and the tab cooperate to limit the fixing member in the axial direction of the pole. In this way, the fixing member is limited in the axial and radial directions of the pole in the assembly slot, ensuring that the fixing member is stably fixed in the assembly slot. And because the temperature sensor is located within the fixing member, the temperature sensor and the fixing member are stably fixed in the assembly slot together, preventing the temperature sensor from shifting. In addition, the temperature sensor located in the assembly slot obtains the temperature of the battery cell by detecting the temperature of the pole. Compared with the method in the prior art of indirectly obtaining the temperature of the battery cell through intermediate components such as nickel sheets and tabs (the tab resistance is large, the temperature is higher, and the pole and tab are welded, the internal resistance increases. If the pole and tab are poorly soldered, the internal resistance is even greater, the temperature is too high, and it does not match the actual temperature), the temperature detected by the temperature sensor is the actual temperature of the battery cell, which ensures the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 An assembly diagram of a battery cell assembly provided in one embodiment of the present application;

[0028] Figure 2 for Figure 1 An exploded view of the battery cell assembly shown in FIG;

[0029] Figure 3 for Figure 1 The structure diagram of the battery cell assembly shown in the figure omits the battery sheet;

[0030] Figure 4 This is a structural diagram of the battery cell assembly shown in the figure, in which the fixing parts and temperature sensor are not assembled into the assembly groove;

[0031] Figure 5 for Figure 1 An axonometric view of a battery cell assembly with a temperature sensor mounted in a fixture;

[0032] Figure 6 for Figure 5 Axonometric drawing of another perspective of the structure shown in;

[0033] Figure 7 for Figure 1 an axonometric view of a fixture of a cell assembly as shown in FIG;

[0034] Figure 8 A structural diagram showing a clamping claw of the clamping mechanism extending into a clamping hole of a fixing member of a battery cell assembly;

[0035] Figure 9 A structural diagram showing the clamping mechanism installing the fixing member into the assembly groove;

[0036] Figure 10 A structural diagram showing a clamping mechanism clamping a fixing member but the fixing member not being assembled in the assembly groove;

[0037] Figure 11 An axonometric view of a fixing member of a battery cell assembly provided in another embodiment of the present application;

[0038] Figure 12 for Figure 11 The fixture shown in the figure is installed with an axonometric view of the temperature sensor and thermal insulation pad.

[0039] Description of reference numerals:

[0040] 100. Battery cell assembly; 10. Battery cell; 11. Pole; 111. Assembly groove; 20. Fixing piece; 21. Ring portion; 211. First notch; 212. Missing portion; 22. Clamp; 221. Second notch; 222. Groove; 23. Clamping portion; 231. Clamping hole; 24. Limiting column; 30. Temperature sensor; 31. Output line; 32. Flanged edge; 40. Tab; 41. Through hole; 50. Thermal insulation pad; 60. Thermal conductive pad; 200. Clamping mechanism; 201. Operating handle; 202. Clamping claw. DETAILED DESCRIPTION

[0041] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0042] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0044] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0045] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0046] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0047] See Figure 1 , an embodiment of the present application provides a battery cell assembly 100, including battery cells 10, and multiple battery cells 10 are arranged in an array. In some specific embodiments, the battery cell assembly 100 includes a row of battery cells 10, and the row of battery cells 10 includes multiple battery cells 10 arranged in sequence along a first direction. In other specific embodiments, the battery cell assembly 100 includes multiple rows of battery cells 10 arranged in sequence along a second direction, and each row of battery cells 10 includes one or more battery cells 10 arranged in sequence along the first direction. The first direction intersects with the second direction. Specifically, the first direction is perpendicular to the second direction. The first direction is Figure 1 The width direction of the battery cell 10, the second direction is Figure 1 The length direction of the battery cell 10.

[0048] It is understandable that the present application does not limit the specific number of battery cells 10 included in the battery cell assembly 100 and can be selected as needed.

[0049] See Figure 1 and Figure 2 The battery cell assembly 100 further includes a tab 40. Each battery cell 10 has a pole 11. The tab 40 is electrically connected to the pole 11 of an adjacent battery cell 10, so that two adjacent battery cells 10 are connected in series or in parallel. In this way, the tab 40 acts as a connector (current carrier) to achieve mutual electrical connection between the battery cells 10.

[0050] Specifically, the tab 40 is welded to the axial end face of the pole 11 away from the battery body. Of course, in other embodiments, the tab 40 can also be connected to the pole 11 in other ways, which are not limited here.

[0051] See Figure 2-Figure 4, the battery cell assembly 100 also includes a fixing part 20 and a temperature sensor 30. Specifically, each battery cell 10 has two poles 11, and at least one pole 11 of each battery cell 10 is provided with an assembly groove 111. Optionally, both poles 11 of each battery cell 10 are provided with an assembly groove 111. It is conceivable that in other embodiments, an assembly groove 111 may also be provided on one pole 11 of each battery cell 10, which is not limited here. The fixing part 20 is provided in the assembly groove 111, and the side wall of the assembly groove 111 abuts against the fixing part 20 to limit the fixing part 20. The fixing part 20 is limited between the pole 11 and the bar 40. Among them, the temperature sensor 30 is provided in the fixing part 20, and the temperature sensor 30 is used to detect the temperature of the pole 11. Specifically, the temperature sensor 30 can detect the temperature of the battery cell 10 during charging and discharging.

[0052] In the battery cell assembly 100 provided in the embodiment of the present application, since the fixing member 20 interferes with the sidewalls of the assembly groove 111, the sidewalls of the assembly groove 111 limit the fixing member 20 in the radial direction of the pole 11. At the same time, since the fixing member 20 is positioned between the pole 11 and the tab 40, the pole 11 and the tab 40 cooperate to limit the fixing member 20 in the axial direction of the pole 11. That is, the bottom wall of the assembly groove 111 and the tab 40 cooperate to limit the fixing member 20 in the axial direction of the pole 11. In this way, the fixing member 20 is axially and radially limited in the assembly groove 111 with respect to the pole 11, ensuring that the fixing member 20 is stably fixed in the assembly groove 111. Furthermore, since the temperature sensor 30 is disposed within the fixing member 20, the temperature sensor 30 and the fixing member 20 are stably fixed in the assembly groove 111 together, preventing the temperature sensor 30 from shifting. In addition, the temperature sensor 30 located in the assembly groove 111 obtains the temperature of the battery cell 10 by detecting the temperature of the pole 11. Compared with the method in the prior art of indirectly obtaining the temperature of the battery cell 10 through intermediate components such as nickel sheets and bar sheets 40 (the bar sheet 40 has a large resistance and a higher temperature, and the pole 11 and the bar sheet 40 are welded, the internal resistance increases. If the pole 11 and the bar sheet 40 are poorly soldered, the internal resistance is even greater, the temperature is too high, and it does not match the actual temperature), the temperature detected by the temperature sensor 30 is the actual temperature of the battery cell 10, which ensures the accuracy of the test.

[0053] In some embodiments, see Figure 2 The tab 40 is provided with a through hole 41 that communicates with the assembly slot 111. The output wire 31 of the temperature sensor 30 is led out through the through hole 41. When the tab 40 is fixed to the terminal 11 by welding, the welding condition of the tab 40 and the terminal 11 can be observed through the through hole 41 and the assembly slot 111 to check for any cold joints or loose soldering. The provision of the through hole 41 also facilitates the lead-out of the output wire 31 of the temperature sensor 30.

[0054] Optionally, circular welding or spot welding can be used when welding the bar 40 to the pole 11. During welding, it should be noted that the welding point cannot appear above the through hole 41, and the welding point is a certain distance (such as 15 mm) from the center point of the through hole 41. This distance can better weld the bar 40 and the pole 11 together during welding. Even if the welding is remote, the assembly groove 111 can be effectively avoided.

[0055] It should be noted that the output line 31 of the temperature sensor 30 is a signal output line 31. Generally, the output line 31 is wrapped with an insulating sheath. The insulation material must meet insulation and voltage resistance requirements, meet flame retardancy requirements, and meet requirements for maintaining its appearance under high temperature conditions. The output line 31 is made of a relatively soft material and can rotate 360 ​​degrees.

[0056] Furthermore, the center points of the mounting groove 111 and the through hole 41 are coaxial. Specifically, the mounting groove 111 has a circular cross-section, and the through hole 41 also has a circular cross-section. The through hole 41 and the mounting groove 111 are concentrically arranged. The diameter of the through hole 41 is smaller than that of the mounting groove 111, facilitating observation of the weld between the tab 40 and the terminal 11. Furthermore, the smaller diameter of the through hole 41 than that of the mounting groove 111 facilitates the positioning of the fixing member 20 between the tab 40 and the terminal 11.

[0057] It should be noted that, in some other embodiments, there is no limitation on the cross-sectional shape of the assembly groove 111 and the through hole 41. For example, the cross-sectional shape of the assembly groove 111 and the through hole 41 can also be square.

[0058] The fixing member 20 can be elastically deformed to switch between a compressed state and an extended state. When the fixing member 20 is in the compressed state, the fixing member 20 can be installed in the assembly groove 111 through the through hole 41. When the fixing member 20 is in the extended state, the fixing member 20 abuts against the side wall of the assembly groove 111 and is limited in the assembly groove 111 by the tab 40. In this way, even after the tab 40 is connected and fixed to the pole 11, the fixing member 20 can be elastically deformed and installed in the assembly groove 111 through the through hole 41 by operating the fixing member 20. Moreover, after the fixing member 20 is installed in the assembly groove 111, it can be stretched under the action of the elastic restoring force to abut against the side wall of the assembly groove 111, thereby facilitating the assembly of various structures.

[0059] It should be understood that in some other embodiments, the fixing member 20 may be installed in the assembly groove 111 first, and then the tab 40 and the pole 11 are connected, which is not limited here.

[0060] It should be noted that the extended state of the fixing member 20 is a state in which the extension degree is greater than that in the compressed state. In the extended state, the fixing member 20 can be compressed or in a free state.

[0061] In some embodiments, see Figure 5-Figure 7 The fixing member 20 includes an annular portion 21, and the temperature sensor 30 is installed in the annular portion 21. The annular portion 21 has a first notch 211. The fixing member 20 can be elastically deformed through the first notch 211 to switch between a compressed state and an extended state. When the fixing member 20 is in the extended state, the annular portion 21 abuts against the side wall of the assembly groove 111, and the annular portion 21 is axially limited between the pole 11 and the bar 40. Since the annular portion 21 has the first notch 211, the deformation degree of the annular portion 21 can be changed by changing the size of the first notch 211 of the annular portion 21, thereby facilitating the fixing member 20 to be installed in the assembly groove 111 through the through hole 41 and abut against the side wall of the assembly groove 111.

[0062] Of course, in other embodiments, the fixing member 20 may be configured in other ways to switch between a compressed state and an extended state. For example, if the fixing member 20 includes an annular portion 21 without a notch, the annular portion 21 can be contracted by applying a force to the annular portion 21. At the same time, when the force is no longer applied to the annular portion 21, the annular portion 21 can be extended by the restoring force.

[0063] Optionally, the fixing member 20 further includes a clamp 22, which is positioned within the annular portion 21. The temperature sensor 30 is mounted within the clamp 22. The clamp 22 has a second notch 221, allowing the temperature sensor 30 to be inserted into the clamp 22 through one end. The clamp 22 can elastically deform through the second notch 221 to securely clamp the temperature sensor 30. Thus, when the temperature sensor 30 is mounted within the clamp 22, the clamp 22 elastically deforms through the second notch 221 to securely clamp the temperature sensor 30, facilitating assembly and securement of the temperature sensor 30.

[0064] It should be understood that in some other embodiments, the fixing member 20 may also omit the clamp 22 , such as directly installing the temperature sensor 30 on the inner wall of the annular portion 21 , which is not limited here.

[0065] Further, see Figure 7 The fixing member 20 further includes two clamping portions 23 disposed opposite to each other. Both clamping portions 23 are disposed within the annular portion 21. Each clamping portion 23 has a clamping hole 231 extending through the clamping portion 23 along the axial direction of the annular portion 21. The two clamping holes 231 are configured to allow the two clamping claws 202 of the clamping mechanism 200 to extend into the operating annular portion 21, so that the fixing member 20 switches from the extended state to the compressed state. Figure 8 The clamping mechanism 200 is a scissor-type structure, comprising an operating handle 201 and clamping jaws 202. Each clamping jaw 202 is connected to an operating handle 201, and the two clamping jaws 202 are hinged via a hinge shaft. Figure 9 and Figure 10 To install the fixing member 20 in the assembly slot 111, grip the operating handle 201 and insert the two clamping jaws 202 into the two clamping holes 231. Press firmly to reduce the size of the annular portion 21. Then, place the annular portion 21 into the through hole 41 of the tab 40 and slowly insert it into the assembly slot 111. When the grip becomes tight, gradually reduce the grip until there is no grip left. Then, remove the clamping jaws 202 from the clamping holes 231. At this point, the bottom of the temperature sensor 30 contacts the bottom wall of the assembly slot 111. In this way, the fixing member 20 can be easily installed in the assembly slot 111.

[0066] In some embodiments, see Figure 11 and Figure 12 When the fixing member 20 is installed in the assembly groove 111, the clamp 22 and the clamping portion 23 all abut against the tab 40. Furthermore, the end of the clamp 22, away from the tab 40, is recessed into the annular portion 21 to form a groove 222, into which the bottom of the temperature sensor 30 is received. With this arrangement, when the fixing member 20 is positioned in the assembly groove 111, the annular portion 21, the clamp 22, and the clamping portion 23 all abut against the tab 40, increasing the contact area between the fixing member 20 and the tab 40 and ensuring the retaining effect of the fixing member 20. Furthermore, the provision of the groove 222 facilitates the accommodation of the temperature sensor 30.

[0067] When assembling the temperature sensor 30, first pass the output wire 31 of the temperature sensor 30 through the hole in the clamp 22, near the groove 222, and then upward to the other end. When assembly is nearly complete, the bottom of the temperature sensor 30 needs to be placed into the groove 222 of the clamp 22. Then, rotate the temperature sensor 30, aligning the output wire 31 toward the second notch 221, to complete the installation. Of course, in other embodiments, the temperature sensor 30 can be left unchanged, in which case the output wire 31 will be away from the second notch 221.

[0068] In some specific embodiments, a flange 32 is provided at the bottom of the temperature sensor 30, and the portion of the temperature sensor 30 with the flange 32 is provided in the groove 222. The flange 32 is abutted against the bottom of the clamp 22, and the clamp 22 cooperates with the flange 32 to limit the movement of the temperature sensor 30 close to the bar 40, thereby ensuring the positioning accuracy of the temperature sensor 30.

[0069] Furthermore, the clamp 22 and the clamping portion 23 are both against the bottom wall of the assembly groove 111 to increase the contact area between the fixing member 20 and the bottom wall of the assembly groove 111, further ensuring the limiting effect of the limiting fixing member 20.

[0070] In some embodiments, the end of the annular portion 21 near the tab 40 abuts against the tab 40 at a position corresponding to the clamping portion 23 and the clamp 22, leaving a missing portion 212. The missing portion 212 is provided to avoid obstructing vision and allows for easier observation of the welding between the tab 40 and the terminal 11.

[0071] In some embodiments, see Figure 7 A retaining post 24 protrudes from the inner portion of the clamp 22. The end of the temperature sensor 30 closest to the tab 40 abuts against the retaining post 24, isolating the temperature sensor 30 from the tab 40 through air. This prevents the temperature of the tab 40 from being transferred to the temperature sensor 30 and causing uncertainty. Furthermore, the retaining action of the retaining post 24 allows the temperature sensor 30 to be more tightly connected to the terminal 11, ensuring accurate temperature detection of the battery cell 10.

[0072] In other embodiments, see Figure 12 The battery cell assembly 100 further includes a thermal insulation pad 50, which is disposed between the temperature sensor 30 and the tab 40. The thermal insulation pad 50 can isolate the temperature sensor 30 from the tab 40 to prevent the temperature of the tab 40 from being transferred to the temperature sensor 30 and causing uncertainty.

[0073] Optionally, continue to Figure 6 The battery cell assembly 100 further includes a thermal pad 60, which is interferingly disposed between the electrode 11 and the temperature sensor 30 and is used to transfer the temperature of the electrode 11 to the temperature sensor 30. The provision of the thermal pad 60 allows for temperature transfer, thereby transferring the temperature of the electrode 11 to the temperature sensor 30. Simultaneously, the thermal pad 60 also acts as a buffer between the temperature sensor 30 and the electrode 11, reducing friction between the temperature sensor 30 and the electrode 11.

[0074] Another embodiment of the present application further provides a battery, which includes the above-mentioned battery cell assembly 100. Since the battery cell assembly 100 has beneficial effects, the battery including the battery cell assembly 100 has the same beneficial effects, which will not be described in detail here.

[0075] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A battery cell assembly, characterized in that: include: A battery cell (10), wherein a plurality of the battery cells (10) are arranged in an array, and each of the battery cells (10) has a pole (11); and an assembly groove (111) is provided on at least one pole (11) of each of the battery cells (10); A fixing member (20) is disposed in the assembly groove (111), and a side wall of the assembly groove (111) abuts against the fixing member (20) to limit the fixing member (20); a temperature sensor (30) disposed in the fixing member (20), the temperature sensor (30) being used to detect the temperature of the pole (11); and The bar (40) is electrically connected to the poles (11) of two adjacent battery cells (10) so that the two adjacent battery cells (10) are connected in series or in parallel, and the fixing member (20) is limitedly arranged between the pole (11) and the bar (40).

2. The battery core assembly according to claim 1, characterized in that The bar (40) is provided with a through hole (41) communicating with the assembly groove (111), and the output line (31) of the temperature sensor (30) is led out through the through hole (41).

3. The battery core assembly according to claim 2, characterized in that: The center points of the assembly groove (111) and the through hole (41) are located on the same axis, and the diameter of the through hole (41) is smaller than the diameter of the assembly groove (111); The fixing member (20) is capable of elastic deformation to switch between a compressed state and an extended state; when the fixing member (20) is in the compressed state, the fixing member (20) can be installed in the assembly groove (111) through the through hole (41); when the fixing member (20) is in the extended state, the fixing member (20) abuts against the side wall of the assembly groove (111) and is limited in the assembly groove (111) by the tab (40).

4. The battery core assembly according to claim 3, characterized in that: The fixing member (20) includes an annular portion (21), the temperature sensor (30) is installed in the annular portion (21), the annular portion (21) has a first notch (211), and the fixing member (20) can be elastically deformed through the first notch (211) to switch between the compressed state and the extended state; When the fixing member (20) is in the extended state, the annular portion (21) abuts against the side wall of the assembly groove (111), and the annular portion (21) is axially limited and disposed between the pole (11) and the tab (40).

5. The battery core assembly according to claim 4, characterized in that: The fixing member (20) further includes a clamp (22), the clamp (22) is located in the annular portion (21), and the temperature sensor (30) is installed in the clamp (22); The clamp (22) has a second notch (221), and the temperature sensor (30) can be inserted into the clamp (22) through one end of the clamp (22). The clamp (22) can be elastically deformed through the second notch (221) to clamp the temperature sensor (30).

6. The battery core assembly according to claim 5, characterized in that: The fixing member (20) further comprises two oppositely arranged clamping portions (23) arranged in the annular portion (21), the clamping portions (23) having a through-hole (231), and the two clamping holes (231) are configured to allow two clamping grips (202) of a clamping mechanism (200) to extend into and operate the annular portion (21), so that the fixing member (200) switches from an extended state to a compressed state.

7. The battery cell assembly according to claim 6, characterized in that: One end of the annular portion (21) close to the tab (40) and the positions corresponding to the clamping portion (23) and the clamp (22) abut against the tab (40), and the remaining portion forms a missing portion (212); and / or The clamp (22) and the clamping portion (23) are both in contact with the tab (40), and the side of the clamp (22) away from the tab (40) is recessed in the annular portion (21) to form a groove (222), and the bottom of the temperature sensor (30) is accommodated in the groove (222).

8. The battery core assembly according to claim 5, characterized in that: A limiting column (24) is protruding from the clamp (22), and one end of the temperature sensor (30) close to the tab (40) abuts against the limiting column (24) to be isolated from the tab (40); or The battery core assembly further includes a heat insulating pad (50), and the heat insulating pad (50) is arranged between the temperature sensor (30) and the tab (40).

9. The battery core assembly according to any one of claims 1 to 8, characterized in that: The battery core assembly further comprises a thermal pad (60), which is interferingly arranged between the pole (11) and the temperature sensor (30) and is used to conduct the temperature of the pole (11) to the temperature sensor (30).

10. A battery, characterized in that: The battery comprises the battery cell assembly according to any one of claims 1 to 9.

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