Battery module and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a battery module and a battery pack, the battery module comprises a first sampling line, a second sampling line and a connector; the first sampling line comprises a first interface part, a connecting part and a first body part; the second sampling line comprises a second interface part, an extension part and a second body part, the second body part extends in the first direction, one end of the second body part is provided with the extension part in the second direction, and the second interface part is arranged on the side, away from the second body part in the first direction, of the extension part; the extension part and the second body part are at least partially overlapped to form a folding part, and the projection of the connecting part in the thickness direction is at least partially overlapped with the folding part; the connector is connected with the first interface part and the second interface part. According to the battery module, the second body part is folded, and the connecting part covers the folding part, so that a three-layer supporting structure can be formed, the first sampling line and the second sampling line can be effectively supported, and the structural stability of the battery module is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to battery modules and battery packs. Background Technology

[0002] Battery modules typically use sampling components to sample the battery's voltage and temperature. The sampled data is used to monitor the battery's operating status. With the development of the new energy sector, the power requirements of battery modules are gradually increasing, leading to an increase in the number of batteries in each module. During the sampling process, the single sampling line commonly used in sampling components is gradually insufficient to meet wiring needs. Therefore, two overlapping sampling lines are used for sampling, and these two lines are connected to a connector to transmit the sampling signal. However, some sampling lines are located between the battery module and the connector and lack effective support, resulting in poor installation stability. This makes the embedded leads in the sampling lines easily damaged during battery module movement. Utility Model Content

[0003] In view of this, the present invention provides a battery module to solve the problem that when stacked sampling lines are connected to connectors, some lines cannot be supported, resulting in poor installation stability of the sampling lines and even easy damage to the leads.

[0004] In a first aspect, this utility model provides a battery module, comprising:

[0005] The first sampling line includes a first interface portion, a connecting portion, and a first body portion. The first body portion extends along a first direction, and the first interface portion is connected to one end of the first body portion through the connecting portion.

[0006] The second sampling line includes a second interface portion, an extension portion, and a second body portion. The second body portion extends along the first direction. One end of the second body portion is provided with the extension portion along a second direction perpendicular to the first direction. The second interface portion is provided on the side of the extension portion away from the second body portion along the first direction. Along the thickness direction, the extension portion and the second body portion at least partially overlap to form a folded portion. The projection of the connecting portion along the thickness direction at least partially overlaps with the folded portion.

[0007] Connectors are respectively connected to the first interface portion and the second interface portion.

[0008] Secondly, this utility model also provides a battery pack, comprising:

[0009] Battery housing;

[0010] The aforementioned battery module is disposed within the battery housing.

[0011] Beneficial effects: This invention forms a folded portion by folding the extension of the second sampling line and covering it with the connecting portion of the first sampling line. This creates a three-layer support structure in the thickness direction, where the extension, the second body, and the connecting portion at least partially overlap. This effectively supports the unsupported portions of the first and second sampling lines, thereby improving the structural stability of the battery module and reducing the risk of lead damage. Compared to the traditional method of directly stacking the first and second sampling lines, this invention offers a more stable structure and eliminates the need for additional reinforcing structures, making it easier to install and use. Attached Figure Description

[0012] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 This is a partial structural diagram of a battery module according to an embodiment of the present utility model;

[0014] Figure 2 This is a schematic diagram of the first and second sampling lines of a battery module according to an embodiment of the present invention;

[0015] Figure 3 This is a partial structural schematic diagram of the second sampling line of a battery module according to an embodiment of the present utility model;

[0016] Figure 4 This is a partial front view of a battery module according to an embodiment of the present invention before the second sampling line is folded.

[0017] Figure 5 This is a partial front view of a battery module according to an embodiment of the present invention, after the second sampling line has been folded.

[0018] Figure 6 This is a partial front view of the first sampling line of a battery module according to an embodiment of the present invention;

[0019] Figure 7 This is a partial enlarged view of a battery module according to an embodiment of the present utility model;

[0020] Figure 8 This is another enlarged view of a battery module according to an embodiment of the present utility model;

[0021] Figure 9 This is a schematic diagram of a battery module according to an embodiment of the present utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. First sampling line; 101. First interface part; 102. Connecting part; 103. First body part; 2. Second sampling line; 201. Second interface part; 202. Extension part; 203. Second body part; 204. Folding part; 3. Connector; 4. Support member; 5. Positioning member; 6. Battery body; 7. Conductive busbar. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of the utility model described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0026] The following is combined Figures 1 to 9 The following describes embodiments of the present invention.

[0027] According to an embodiment of the present invention, a battery module is provided, comprising: a first sampling line 1, a second sampling line 2, and a connector 3.

[0028] The first sampling line 1 includes a first interface portion 101, a connecting portion 102, and a first body portion 103. The first body portion 103 extends along a first direction, and the first interface portion 101 is connected to one end of the first body portion 103 via the connecting portion 102. The first interface portion 101 is used to connect to the connector 3 and output a sampling signal.

[0029] The second sampling line 2 includes a second interface portion 201, an extension portion 202, and a second body portion 203. The second body portion 203 extends along a first direction, and one end of the second body portion 203 has an extension portion 202 along a second direction perpendicular to the first direction. The second interface portion 201 is located on the side of the extension portion 202 away from the second body portion 203 along the first direction. The second interface portion 201 is also used to connect to the connector 3 to output a sampling signal.

[0030] Along the thickness direction, the extension 202 of the second sampling line 2 is folded along the fold line and at least partially overlaps with the second body portion 203 to form a folded portion 204. After the second sampling line 2 is folded, the first sampling line 1 and the second sampling line 2 are stacked such that the projection of the connecting portion 102 along the thickness direction at least partially overlaps with the folded portion 204. The connector 3 is connected to the first interface portion 101 and the second interface portion 201 for outputting sampling data.

[0031] Therefore, the battery module provided in this embodiment of the present invention, by folding the extension 202 of the second sampling line 2 to form a folded portion 204, and covering the connecting portion 102 of the first sampling line 1 on the folded portion 204, can form a three-layer support structure in the thickness direction, in which the extension 202, the second body portion 203, and the connecting portion 102 at least partially overlap. That is, a more stable three-layer support structure is formed on the side near the connector 3. Since this part cannot be supported by the battery pack and is often in a suspended state, such a three-layer support structure is beneficial for effectively supporting the unsupported parts of the first sampling line 1 and the second sampling line 2, thereby improving the structural stability of the battery module and reducing the risk of lead wire damage. Compared with the traditional method of directly stacking the first sampling line 1 and the second sampling line 2, the structure of the present invention is more stable and does not require additional reinforcing structures, making it convenient for installation and use. Compared with the method of extending the length of the first interface portion 101 and the second interface portion 201 to prevent their lead wire breakage, the structure of this embodiment of the present invention occupies less space.

[0032] Compared to folding the first sampling line 1 and the second sampling line 2 simultaneously, the structural thickness of this embodiment is relatively suitable, avoiding excessively thick overlapping areas that could affect the assembly of the first sampling line 1 and the second sampling line 2.

[0033] Specifically, the first direction is as follows Figure 2 As shown by arrow A in the diagram, the second direction is as follows: Figure 2 As indicated by arrow B in the diagram, the thickness direction is perpendicular to the plane formed by the first and second directions. Furthermore, the second body portion 203 is flexible to bend and fold the extension portion 202. After the extension portion 202 and the second body portion 203 are stacked to form the folded portion 204, the second interface portion 201 is then connected to the connector 3. Both the first body portion 103 and the second body portion 203 can extend along the arrangement direction of the battery body 6 in the battery module, and they are arranged parallel to each other with a gap to save space.

[0034] Specifically, such as Figure 4 As shown, the second sampling line 2 is generally L-shaped. After folding the extension 202 and the second body 203 along the fold line OO, the extension 202 and the second body 203 partially overlap, forming as shown. Figure 5 The fold shown is 204.

[0035] It should be noted that, in the embodiments of this utility model, as... Figure 9 As shown, the battery module also includes multiple battery bodies 6 and multiple conductive busbars 7. The multiple battery bodies 6 are arranged in a row along a first direction, and the terminals on the multiple battery bodies 6 are electrically connected sequentially through the multiple conductive busbars 7. The first sampling line 1 and the second sampling line 2 can be used to collect the voltage signal of the conductive busbars 7.

[0036] It should be noted that the number of battery bodies 6 and conductive busbars 7 within the battery module can be adjusted according to actual needs, and this embodiment of the invention does not impose excessive restrictions on this. Furthermore, the conductive busbars 7 can connect the battery bodies 6 in series, parallel, or a series-parallel connection as needed.

[0037] In one embodiment, such as Figure 5 As shown, in the second direction, the distance between the folded portion 204 and the second interface portion 201 is L, which satisfies L≥0.5cm. The extension portion 202 has an elastic force to restore its original shape after folding. If the value of L is too small, the extension portion 202 will be too close to the second interface portion 201 after folding, and the elastic force of the folded portion 204 will easily be transmitted to the second interface portion 201, thereby causing the solder joints of the connector 3 and the second sampling line 2 of the second interface portion 201 to detach.

[0038] For example, in this embodiment of the present invention, the value of L can be 1cm, 2cm, 5cm, etc.

[0039] In one embodiment, such as Figure 6 As shown, the connecting portion 102 is disposed at one end of the first body portion 103 along the second direction, and the first interface portion 101 is disposed on the side of the connecting portion 102 away from the first body portion 103 along the first direction.

[0040] Specifically, the first body portion 103 is perpendicular to the connecting portion 102, and the second body portion 203 is perpendicular to the extension portion 202, so that the first sampling line 1 and the second sampling line 2 are both L-shaped, so as to facilitate the arrangement of the first interface portion 101 and the second interface portion 201. It also allows the first body portion 103 and the second body portion 203 to be separated by a distance, so as to avoid the two overlapping and generating additional thickness, and occupying too much space above the battery body 6.

[0041] In one embodiment, such as Figure 5 and Figure 6 As shown, the first interface section 101 and the second interface section 201 each include multiple sub-interfaces, and the multiple sub-interfaces are electrically connected to the pins of multiple connectors 3 after being stacked.

[0042] It should be noted that the number of battery bodies 6 affects the voltage sampling data of the conductive busbars 7. Each conductive busbar 7 needs to be equipped with at least one sampling nickel plate. Each sampling nickel plate is connected to the connector 102 through an independent lead arranged on the sampling line, and is electrically connected to each pin of the connector 3 respectively. Multiple connectors 3 can be set to meet the wiring requirements of the conductive busbars 7.

[0043] In one embodiment, after being stacked, the first interface portion 101, portions of the second body portion 203, and the second interface portion 201 are arranged sequentially from top to bottom. That is, the first interface portion 101 is located on the top layer, the second interface portion 201 is located on the bottom layer, and portions of the second body portion 203 are located in the middle. This arrangement allows the portions of the second body portion 203 to separate the first interface portion 101 and the second interface portion 201, preventing the first interface portion 101 and the second interface portion 201 from overlapping.

[0044] Specifically, the up and down directions are as follows: Figure 8 As shown, this is in the thickness direction. Multiple battery bodies 6 are positioned below the first sampling line 1 and the second sampling line 2.

[0045] In addition, to facilitate the connection of the first sampling line 1 and the second sampling line 2 to the conductive busbar 7, the first interface portion 101 is bent downward at 90° relative to the connecting portion 102, and the second interface portion 201 is bent downward at 90° relative to the extension portion 202. The first interface portion 101 and the second interface portion 201 are assembled into a whole by a connector, and then connected to the connector 3.

[0046] Furthermore, in one embodiment, such as Figure 7 and Figure 8 As shown, a support member 4 is provided between the extension portion 202 and the second body portion 203. When the second body portion 203 is positioned in the middle, the upper layer of the second body portion 203 is pressed down by the connecting portion 102. The support member 4 provided between the extension portion 202 and the second body portion 203 can prevent subsequent compression from causing repeated bending of the extension portion 202, resulting in metal fatigue of the lead wire and thus causing the lead wire to break.

[0047] It should be noted that the material of the support member 4 is not limited in this embodiment of the utility model. Any existing material can be used, such as soft support material such as foam.

[0048] In one embodiment, after being stacked, portions of the second interface portion 201, the second body portion 203, and the first interface portion 101 are arranged sequentially from top to bottom. At this time, the second interface portion 201 is located on the top layer, the first interface portion 101 is located on the bottom layer, and portions of the second body portion 203 are located in the middle. This arrangement prevents the upper layer of the second body portion 203 from being pressed down by the connecting portion 102, further improving the structural stability of the battery module.

[0049] Furthermore, such as Figure 7 and Figure 8 As shown, in one embodiment, a positioning member 5 is provided on the side of the extension 202 facing away from the second body portion 203. Specifically, the positioning member 5 can be made of foam. The positioning member 5 is located above the extension 202 and is used to limit the positioning of the first interface portion 101 and the second interface portion 201.

[0050] It should be noted that the first sampling line 1 and the second sampling line 2 are positioned between the battery module's cover and the battery body 6. The lower parts of the first sampling line 1 and the second sampling line 2 are in contact with the battery body 6, while the upper parts of the first sampling line 1 and the second sampling line 2 are separated from the cover by a certain gap. In this embodiment, a positioning member 5 is used to fill this gap, so that both the extension 202 and the folded part 204 are pressed down by the cover via the positioning member 5, preventing the extension 202 and the folded part 204 from sliding or misaligning in the gap. It also limits the folded part 204 to prevent it from rebounding.

[0051] In one embodiment, the first sampling line 1 and the second sampling line 2 comprise a single-sided FPC (Flexible Printed Circuit) or FFC (Flexible Flat Cable). FPCs or FFCs are flexible and can be bent, adapting to the complex spatial layout within the battery module. They also integrate voltage and temperature acquisition lines and signal conditioning circuits (such as voltage divider resistors and filter capacitors), reducing external connection nodes and simplifying battery module assembly.

[0052] The voltage difference between opposite or adjacent pins in connector 3 is subject to design requirements. Exceeding the withstand voltage between two pins of connector 3, i.e., exceeding the maximum voltage that the two pin terminals can withstand, will cause electrical insulation failure, leading to short circuits and fires. For example, commonly used connectors in the prior art are TE connectors or Molex connectors. The withstand voltage of adjacent pins in a TE connector is 80V, and the withstand voltage of opposite pins is 120V. For a Molex connector, the withstand voltage of adjacent pins is 40V, and the withstand voltage of opposite pins is 100V. In one embodiment, the voltage difference between opposite or adjacent pins in connector 3 is less than or equal to 20V. This ensures that the voltage difference between pins or adjacent pins is far less than the requirements of the connector design specifications, simplifying the design process for pin withstand voltage in the battery module.

[0053] For example, in this embodiment of the present invention, the voltage difference between the relative pins and adjacent pins in the connector 3 can be 1V, 2V, 4V, 5V, 8V, 10V, 12V, 15V, 18V, etc.

[0054] For example, such as Figure 9As shown, the first sampling line 1 and the second sampling line 2 respectively collect voltage data of the conductive busbars 7 on the two battery bodies 6. The pin arrangement order of the first interface section 101 and the second interface section 201 is the same. The potential of the conductive busbars 7 corresponding to the adjacent leads of the first interface section 101 and the second interface section 201 is arranged in descending or ascending order.

[0055] In existing technology, the first sampling line collects voltage signals V0, V2, V4, V6, V8, and V10 and corresponds to one connector, while the second sampling line collects voltage signals V1, V3, V5, V7, V9, and V11 and corresponds to another connector. Taking V0 to V4 as an example, when the second sampling line is disconnected, the voltages of V1 and V3 are 0, V2 is the sum of the voltages of the two battery cells, and the voltage difference between V2 and the adjacent V1 and V3 pins is the voltage of the two battery cells. The voltage difference between V4 and V3 is the voltage of all four battery cells. This pattern continues, with the voltage difference between adjacent pins increasing as the series progresses, making it easier to exceed the withstand voltage of adjacent or opposite pins, leading to breakdown defects.

[0056] In this embodiment of the utility model, such as Figure 9 As shown, the first interface section 101 collects voltage signals V0, V2, and V4 and corresponds to the first connector 3; the first interface section 101 collects voltage signals V6, V8, and V10 and corresponds to the second connector 3. The second interface section 201 collects voltage signals V1, V3, and V5 and corresponds to the first connector 3; the second interface section 201 collects voltage signals V7, V9, and V11 and corresponds to the second connector 3. This configuration ensures that the voltage difference between the pins in connector 3 is equal to the voltage of one battery body 6, and the voltage difference between adjacent pins is equal to the voltage difference between two battery bodies 6. This guarantees that the voltage difference around a pin does not exceed the voltage difference between two battery bodies 6, thus avoiding excessive voltage difference and reducing the risk of breakdown.

[0057] In one embodiment, the battery module further includes a battery management system. Connector 3 includes a mating female connector and a male connector. One of the female and male connectors is connected to the first sampling line 1 and the second sampling line 2, and the other is connected to the battery management system. The battery management system is connected to the first sampling line 1 and the second sampling line 2 through the mating of the female and male connectors for subsequent signal transmission.

[0058] According to an embodiment of the present invention, another aspect provides a battery pack, including a battery housing and a battery module, wherein the battery module is disposed in the battery housing.

[0059] The battery pack of this embodiment forms a folded portion 204 by folding the extension 202 of the second sampling line 2, and covering the connecting portion 102 of the first sampling line 1 on the folded portion 204. This creates a three-layer support structure in the thickness direction, where the extension 202, the second body portion 203, and the connecting portion 102 at least partially overlap. This results in a more stable three-layer support structure on the side near the connector 3, where the battery pack cannot support the unsupported portion and is often suspended. Therefore, this three-layer support structure effectively supports the unsupported portions of the first and second sampling lines 1 and 2, thereby improving the structural stability of the battery module and reducing the risk of lead wire damage. Compared to the traditional method of directly stacking the first and second sampling lines 1 and 2, the structure of this invention is more stable and requires no additional reinforcing structure, making it convenient for installation and use.

[0060] To achieve the basic functions of the battery pack, the battery pack in this embodiment may also include other necessary modules or components, such as a housing, a thermal management system, etc. It should be noted that any suitable existing structure can be selected for the other necessary modules or components included in the battery pack. To clearly and concisely illustrate the technical solution provided in this embodiment, the above-mentioned parts will not be repeated here, and the accompanying drawings have also been simplified accordingly. However, it should be understood that the scope of this utility model is not limited thereto.

[0061] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery module, characterized in that, include: The first sampling line (1) includes a first interface portion (101), a connecting portion (102) and a first body portion (103). The first body portion (103) extends along a first direction, and the first interface portion (101) is connected to one end of the first body portion (103) through the connecting portion (102). The second sampling line (2) includes a second interface portion (201), an extension portion (202), and a second body portion (203). The second body portion (203) extends along the first direction. One end of the second body portion (203) is provided with the extension portion (202) along a second direction perpendicular to the first direction. The second interface portion (201) is provided on the side of the extension portion (202) away from the second body portion (203) along the first direction. Along the thickness direction, the extension portion (202) and the second body portion (203) at least partially overlap to form a folded portion (204). The projection of the connecting portion (102) along the thickness direction at least partially overlaps with the folded portion (204). The connector (3) is connected to the first interface part (101) and the second interface part (201) respectively.

2. The battery module according to claim 1, characterized in that, In the second direction, the distance between the folded portion (204) and the second interface portion (201) is L, which satisfies L≥0.5cm.

3. The battery module according to claim 1, characterized in that, The connecting portion (102) is disposed at one end of the first body portion (103) along the second direction, and the first interface portion (101) is disposed on the side of the connecting portion (102) away from the first body portion (103) along the first direction.

4. The battery module according to claim 1, characterized in that, The first interface section (101) and the second interface section (201) each include a plurality of sub-interfaces, and the plurality of sub-interfaces are stacked together and electrically connected to the pins of the plurality of connectors (3).

5. The battery module according to claim 1, characterized in that, After being stacked, the first interface part (101), the second body part (203), and the second interface part (201) are arranged sequentially from top to bottom.

6. The battery module according to claim 5, characterized in that, A support member (4) is provided between the extension (202) and the second body part (203).

7. The battery module according to claim 1, characterized in that, After being stacked, portions of the second interface portion (201), the second body portion (203), and the first interface portion (101) are arranged sequentially from top to bottom.

8. The battery module according to claim 7, characterized in that, A positioning member (5) is provided on the side of the extension (202) facing away from the second body part (203), and the positioning member (5) is used to limit the first interface part (101) and the second interface part (201).

9. The battery module according to claim 1, characterized in that, The first sampling line (1) and the second sampling line (2) include FPC or FFC.

10. The battery module according to claim 1, characterized in that, The voltage difference between the relative pins and adjacent pins in the connector (3) is less than or equal to 20V.

11. A battery pack, characterized in that, include: Battery housing; The battery module according to any one of claims 1 to 10, wherein the battery module is disposed in the battery housing.

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